すべてのツール

488 個の無料オンラインツールをすべて閲覧できます。

カラー

11 個のツール

カラーコンバーター

カラー形式を変換。

Palette ジェネレーター

Generate beautiful, harmonious color palettes from a seed color.

グラデーション生成器

CSSグラデーションを作成。

コントラストチェッカー

色コントラストを検証。

Tailwind カラー ファインダー

Find the closest Tailwind CSS color for any hex or RGB value.

Box Shadow ジェネレーター

Design CSS box shadows with a visual editor and live preview.

画像 カラー Palette エクストラクター

Upload an image and extract its dominant color palette using k-means clustering.

画像 カラー Picker

Upload an image and click anywhere to pick exact color values in HEX, RGB, and HSL.

カラー Shade ジェネレーター

Generate a full range of tints and shades from any base color for design palettes.

PANTONE to HEX

Look up popular PANTONE colors and get their HEX and RGB equivalents. Browse by color family.

カラー Temperature コンバーター

Convert Kelvin color temperature to RGB and HEX. Reference chart for candles, tungsten, daylight, and more.

コンテンツ

21 個のツール

HTML リンク-in-Bio ビルダー

Generate a blazing fast static HTML alternative to Linktree.

Podcast Show Notes ビルダー

Generate rich markdown show notes with timestamps and resource links.

Email Preheader ジェネレーター

Generate stronger inbox preview text that complements your subject line.

Startup 名前 Availability チェッカー

Generate startup names from a keyword and jump into registrar availability checks.

UTM Tracking ビルダー

Standardize your marketing attribution links.

リンク-in-Bio ジェネレーター

Create a simple static HTML profile page.

Hashtag Group ジェネレーター

Curated hashtag clusters to boost organic reach.

テキスト to Hashtags

Turn captions, notes, or drafts into platform-ready hashtag ideas.

Thread to Tweet コンバーター

Condense a long thread into one tighter post for X or Twitter.

Bio ジェネレーター for Social

Generate sharper bios for Instagram, X, LinkedIn, and creator profiles.

Email Subject Line テスター

Score subject lines, preview mobile fit, and create test variants.

Rap 名前 ジェネレーター

Generate catchy stage names for rappers, producers, and alter egos.

Bio リンク Page ビルダー

Create a customizable link-in-bio page with social icons and downloadable HTML.

Blog タイトル ジェネレーター

Generate catchy, click-worthy blog post titles from your keywords using proven headline formulas.

Business 名前 ジェネレーター

Generate creative startup and business name ideas from your keywords instantly.

Engagement レート 計算機

Calculate social media engagement rates by followers and reach with quality ratings.

Hashtag ジェネレーター

Generate categorized hashtag sets for any niche to boost social media reach.

Headline アナライザー

Score your headlines for power words, emotional impact, length, and CTR potential.

Slogan ジェネレーター

Generate catchy marketing slogans and taglines from your brand keywords.

UTM リンク ビルダー

Build campaign tracking URLs with UTM source, medium, campaign, and content parameters.

AI Content Detector

Detect if text is AI-generated using heuristic analysis and pattern recognition.

コンバーター

22 個のツール

長さ変換ツール

長さを変換。

重さ変換ツール

重さを変換。

温度変換ツール

温度を変換。

Volume コンバーター

Convert liters, gallons, cups, and ounces for cooking and science.

Area コンバーター

Determine exact conversions for sq meters, sq feet, and acres.

速度 コンバーター

Quickly find equivalent speeds in mph, km/h, knots, and mach.

Digital Storage コンバーター

Transform bytes to megabytes, gigabytes, terabytes, and more.

時間 コンバーター

Convert exact units measuring seconds, minutes, days, and years.

単位変換ツール

単位を変換。

Byte コンバーター

Convert between bytes, KB, MB, GB, TB, and PB.

HEIC to JPG / PNG コンバーター

Convert HEIC or HEIF photos into standard JPG or PNG files right in your browser.

画像 Format コンバーター

Convert images between JPG, PNG, and WebP without uploading them anywhere.

Fuel Economy コンバーター

Convert between MPG and L/100km.

Shoe サイズ コンバーター

Convert shoe sizes between US, UK, EU, and CM.

Bra サイズ コンバーター

Translate global bra sizing conventions.

Ring サイズ コンバーター

Standardize ring sizes across regions and diameters.

Excel / CSV to PDF コンバーター

Turn pasted spreadsheet rows or uploaded CSV/TSV files into a polished PDF table.

Cooking Measurement コンバーター

Convert between cups, tablespoons, teaspoons, milliliters, and other kitchen measurements.

Digital Storage コンバーター

Convert between bits, bytes, kilobytes, megabytes, gigabytes, and terabytes instantly.

Shoe サイズ コンバーター

Convert shoe sizes between US, UK, EU, and centimeter measurements for men and women.

Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals back to decimal instantly with validation.

Roman Numeral コンバーター

Convert numbers to Roman numerals and Roman numerals back to decimal instantly.

データ

29 個のツール

JSON バリデーター & フォーマッター

Validate syntax, catch errors, and auto-indent complex JSON payloads.

Base64から画像

画像に変換。

画像からBase64

Base64に変換。

URL Parser

Parse, inspect, and extract parts of URLs and query parameters.

JSON-to-Zod-to-Prisma

Convert JSON payloads into TypeScript Interfaces, Zod schemas, and Prisma models instantly.

JSON Diff Visualizer

Compare two JSON objects and inspect structural changes path by path.

SQL Query Runner

Run practical SQL queries against an in-browser CSV-backed table.

JSON Schema ジェネレーター

Generate draft 2020-12 JSON Schema documents from sample JSON.

.env ファイル バリデーター

Audit, validate, and alphabetically sort your environment variables safely.

CSVからJSON

CSVからJSON。

XML フォーマッター

Format, validate and prettify raw XML documents.

JSONフォーマッター

JSONデータを整形して検証。

Base64 エンコーダー/デコーダー

Encode and decode strings to and from Base64 format.

URLエンコーダー

Web用URLをエンコード。

SQLフォーマッター

SQLコードを整形。

数字 Base コンバーター

Convert numbers between binary, octal, decimal, and hex.

Unix Timestamp コンバーター

Convert Unix timestamps to human-readable dates and back.

JSONからCSV

JSONからCSV。

YAMLからJSON

YAMLからJSON。

Binary-Decimal-Hex コンバーター

Convert between binary, decimal, and hexadecimal. All 6 directions: bin→dec, bin→hex, dec→bin, dec→hex, hex→bin, hex→dec.

JWT ビルダー

Build and encode JSON Web Tokens with custom headers and payloads.

Unicode Inspector

Paste any text and inspect each character\

数字 to Words

Convert any number to English words, ordinal form, and currency format. Handles up to quadrillions.

Barcode ジェネレーター

Generate CODE128 barcodes from any text. Download as PNG instantly in your browser.

Fake Dataset ジェネレーター

Generate realistic fake CSV datasets with names, emails, phones, dates, salaries, and more.

ISS Tracker

Track the real-time location of the International Space Station as it orbits Earth.

Starlink Tracker

View live positions of SpaceX Starlink internet satellites orbiting Earth.

Space Launch Tracker

Browse upcoming rocket launches from space agencies and private companies worldwide.

NASA Image Viewer

Search and explore thousands of NASA photos from space, Earth, and astronomy.

開発者

43 個のツール

HTML フォーマッター

Format, beautify, and auto-indent ugly or minified HTML code.

HTML Minifier

Minify and compress your HTML code to save file size and boost load speeds.

RGB to HEX コンバーター

Convert color values between RGB blocks and standard Hex codes.

PX to REM コンバーター

Translate CSS pixel constraints to accessibility-standard rem ratios.

CSS フォーマッター

Beautify nested and unformatted CSS code blocks securely.

CSS Box Shadow ジェネレーター

Visually construct CSS layer shadows and generate cross-browser code.

Markdown Table ジェネレーター

Construct MD tables visually without writing the tedious syntax manually.

Regex Explain ツール

Turn regular expressions into plain-English explanations for faster debugging.

SVG to JSX コンバーター

Convert raw SVG code into a React JSX component instantly.

正規表現テスター

正規表現をテスト。

HTML Entity ツール

Encode and decode HTML entities for safe web content.

CSSミニファイア

CSSコードをミニファイ。

JS Minifier

Minify JavaScript code by removing whitespace and comments.

Glassmorphism ジェネレーター

Design frosted glass CSS UI components with a visual editor.

Neumorphism UI ジェネレーター

Design soft UI CSS components instantly with a visual editor.

Diffチェッカー

2つのテキストを比較。

Tailwind UI Visualizer

Paste Tailwind HTML and view a sandboxed live preview instantly.

React to Vue コンバーター

Convert functional React components to Vue 3 Composition API.

Extension Manifest ビルダー

Visually scaffold Chrome Extension MV3 manifest.json files.

PDF Signature

Draw a signature and place it on a PDF page entirely in your browser.

PDF Merge

Combine multiple PDF files into one merged document directly in your browser.

PDF Split

Split one PDF into smaller page ranges or extracted sections locally in your browser.

PDF Compress

Estimate and prepare a smaller PDF output with compression presets directly in your browser.

OCR PDF to Text

Extract readable text from scanned PDF documents with a clean copy-ready output.

PDF to Word

Prepare an editable document export from a PDF with honest fidelity guidance for complex layouts.

WordからPDF

WordからPDF。

OCR Image to Text

Extract readable text from screenshots, scans, receipts, and images with a clean copyable result.

JWT Decoder Pro

Decode JWT headers and payloads locally with readable inspection output and expiry visibility.

PDF Page 数字 Adder

Add page numbers to every PDF page with custom placement, size, labels, and page-range control.

PDF Compare

Compare two PDFs locally by hash, metadata, page dimensions, and form fields.

Fillable PDF Form Creator

Create a browser-generated fillable PDF with text fields, dropdowns, and checkboxes.

SVG オプティマイザー & Minifier

Minify SVG code, strip comments, reduce whitespace, and download the optimized file.

Chmod 計算機

Calculate Unix file permission values by toggling read, write, and execute bits visually.

CSS Flexbox ジェネレーター

Visually build CSS Flexbox layouts with live preview and generated code output.

Favicon ジェネレーター

Upload any image and generate favicons in all standard sizes from 16px to 512px.

HTML to Markdown コンバーター

Convert HTML code into clean, readable Markdown syntax instantly.

Common Regex Patterns

Browse and copy common regex patterns for email, URL, phone, date, and more.

CSS Grid ジェネレーター

Visually build CSS Grid layouts and generate production-ready code.

CSS Clip-Path ジェネレーター

Generate CSS clip-path polygon values with visual presets. See a live preview and copy the CSS.

Visual Regex テスター

Test regular expressions with live highlighted matches. See match groups and use common regex snippets.

テキスト Diff Merger

Compare two text blocks line by line. See added, removed, and unchanged lines highlighted with stats.

JSON Path Evaluator

Query and extract data from JSON using JSONPath expressions with real-time results and syntax highlighting.

JWTデコーダー

JWTトークンをデコード。

金融

38 個のツール

Freelance レート 計算機

Calculate your true required hourly rate based on target income.

Wedding Budget プランナー

Structure and visualize your entire wedding budget with dynamic categories.

Credit Card Payoff

Visualize exactly how long your credit card debt will take to pay off.

SIP 計算機

Calculate future wealth using a Systematic Investment Plan.

Lumpsum 計算機

Estimate returns on a one-time lumpsum investment over time.

ROI 計算機

Calculate Return on Investment and annualized gains.

Income Tax 計算機

Estimate federal income tax brackets and net take-home pay.

Net Worth 計算機

Track assets vs liabilities to determine your true net worth.

Retirement 計算機

Project 401k savings and compound interest for retirement.

Auto Loan Payoff

Calculate interest saved by making extra monthly car payments.

Inflation 計算機

Measure the historical or projected purchasing power of money.

SaaS Churn 計算機

Calculate customer churn rate and projected user numbers.

Rent vs Buy 計算機

Compare the long term costs of renting vs owning a home.

Cost Per Wear 計算機

Calculate the true cost of an item based on how often you wear it.

FIRE Retirement 計算機

Calculate your exact Financial Independence, Retire Early number.

Crypto Profit 計算機

Track crypto gains, trading fees, and total net ROI.

CAGR 計算機

Find the Compound Annual Growth Rate of an investment.

Markup / Margin 計算機

Compare markup vs margin and find the selling price needed for your target profit.

Compound Interest Visualizer

Project compound growth with recurring contributions, milestones, and inflation-adjusted value.

Debt-to-Income Ratio 計算機

Calculate front-end and back-end DTI ratios for mortgages, lending, and budgeting.

Amazon Fee 計算機

Estimate Amazon referral fees, FBA costs, ad spend, and net profit per unit.

Latency Cost 計算機

Estimate how much page speed improvements could recover in revenue and profit.

Subscription vs One-時間 Cost 計算機

Compare recurring subscription spend against one-time purchase costs over time.

Lead Value 計算機

Turn traffic, conversion rates, and deal value into a real per-lead and per-visitor number.

Electricity Cost 計算機

Calculate daily, monthly, and yearly electricity costs for any appliance by wattage.

EMI 計算機

Calculate Equated Monthly Installment for loans. Input principal, interest rate, tenure. Output EMI amount, total interest, total payment.

Expense Ratio Impact 計算機

Compare how different fund expense ratios eat into your long-term investment returns.

Gas Trip Cost 計算機

Calculate the total fuel cost for a road trip based on distance, MPG, and gas price.

Invoice ジェネレーター

Create professional invoices with line items, tax calculations, and PDF export.

Paycheck 計算機

Estimate your net take-home pay after federal tax, state tax, and retirement deductions.

Rent Affordability 計算機

Calculate how much rent you can afford based on income, debts, and the 30% rule.

Startup Runway 計算機

Calculate how many months of runway your startup has based on cash, burn, and growth.

Stock Return 計算機

Calculate total return, percentage gain, and CAGR on any stock investment.

Crypto Price Tracker

Track Bitcoin, Ethereum and other cryptocurrency prices in real-time with 24h changes.

クリプトトラッカー

暗号通貨のリアルタイム価格を追跡。

Discount Calculator

Calculate final price after discount by percentage or fixed dollar amount instantly.

Fuel Cost Calculator

Calculate fuel costs for trips with MPG and price per gallon or liter conversions.

Hourly to Salary

Convert hourly wage to annual, monthly, weekly, and daily salary equivalents instantly.

エンターテイメント

33 個のツール

Spin the ホイール

A customizable random picker wheel for decisions and games.

コイン投げ

コインを投げる。

サイコロ

サイコロを振る。

Fake Person ジェネレーター

Generate polished fictional personas for mockups, demos, QA, and creative work.

Fake iOS Message ジェネレーター

Create fake iOS conversational text bubbles for memes and social media.

Dog to Human Years

Adjusted breed and size scalings for dog aging.

Cat to Human Years

Calculate equivalent human aging for felines.

What Should I Watch? クイズ

Take a short mood quiz and get a tailored movie or series recommendation.

カラー Personality Test

Answer quick vibe questions to reveal your color aura personality.

Birthday Flower & Birthstone Lookup

Look up the traditional birth flower, birthstone, and zodiac vibe for any birthday.

This Day in History

Browse notable historical events, births, and deaths for any calendar date.

Doge Meme メーカー

Create authentic 2013-era doge memes with Comic Sans.

Fortune Cookie スピナー

Crack open a daily cookie to find your fortune and lucky numbers.

Affirmation ジェネレーター

Generate daily positive affirmations to boost confidence and motivation.

Fake Identity ジェネレーター

Generate random fictional identities with names, addresses, and job titles for testing.

Mad Libs 単語 Game

Fill in nouns, verbs, and adjectives to create hilarious randomized stories.

Magic 8-Ball

Ask the Magic 8-Ball any yes-or-no question and receive a mysterious fortune.

Meme テキスト ジェネレーター

Upload an image and add Impact-style top and bottom text to create classic memes.

ランダム 名前 Picker

Paste a list of names and randomly pick a winner with animated selection.

数字 Guessing Game

Guess the secret number with higher/lower hints in as few tries as possible.

Reaction 時間 Test

Measure your reaction speed in milliseconds with a click-when-green test.

Rock Paper Scissors

Play classic Rock Paper Scissors against the computer with score tracking.

Truth or Dare ジェネレーター

Get random truth questions and dare challenges for parties and game nights.

単語 Scramble Game

Unscramble jumbled letters to find the hidden word and build your streak.

Would You Rather

Answer fun "would you rather" dilemma questions with two impossible choices.

カラー Blind Test

Test your color vision and hue spotting ability.

Country Info Lookup

Get detailed information about any country including capital, population, currency, and languages.

Random Animal Pictures

Get random pictures of animals with facts and descriptions for each animal.

Random Fact Generator

Generate interesting and surprising random facts updated daily for learning and entertainment.

Random Joke Generator

Get random jokes from multiple categories including programming, knock-knock, and more.

Random Quote Generator

Get inspirational and motivational random quotes from famous authors and figures.

This Day in History

Discover important historical events, births, and milestones from today's date in history.

Fake Person Generator

Generate polished fictional personas with names, addresses, and job titles for mockups, demos, QA, and creative work.

ゲーム

28 個のツール

Typing 速度 Test

Test your typing speed in WPM with accuracy tracking and real-time error highlighting.

単語 Guess

Play a daily word guessing game similar to Wordle.

2048

Slide tiles and merge them to reach 2048.

Minesweeper

Clear the hidden minefield without detonating any bombs.

Sudoku

Classic number puzzle game. Fill the grid with digits 1-9.

Nonogram

Solve logic puzzles to reveal a hidden picture.

Crossword Mini

Solve a quick daily mini crossword puzzle.

Web Dev Tycoon

An idle clicker game. Build your web development empire.

Pizza Clicker

Click to bake pizzas and upgrade your pizzeria.

Aim Trainer

Improve your mouse accuracy and reaction speed.

Snake

Classic retro snake game. Eat food and grow longer.

Block Drop (Tetris)

Clear lines by strategically dropping cascading blocks.

Flappy Box

Flap your way through obstacles in this frustratingly fun game.

Breakout

Smash through retro brick layouts with a bouncing ball.

Space Invaders

Defend the Earth from waves of descending alien ships.

Tower Stacker

Stack moving blocks as high as you can.

Tic Tac Toe

Play the classic X\

Connect 4

Drop discs to connect four in a row before your opponent.

Hangman

Guess the hidden word before the stickman is fully drawn.

Math Dash

Solve quick math problems against the clock.

Solitaire

Play classic Klondike Solitaire right in your browser.

Checkers

Play a classic game of checkers against a computer opponent.

Memory Card Match

Test your memory by finding matching pairs of cards.

Simon Says

Memorize and repeat the growing sequence of colors.

Whack-A-Mole

Whack the moles as they pop out of their holes!

Reaction Time Test

Test your reaction time with click-speed game and track average reactions across multiple trials.

Trivia Quiz Game

Play trivia questions with multiple difficulty levels, score tracking, and instant feedback.

Typing Speed Test

Test typing speed and accuracy with 60-second timer, WPM calculation, and accuracy metrics.

ゲーム

15 個のツール

FPS Sensitivity コンバーター

Convert your mouse sensitivity between CS2, Valorant, Apex, Fortnite, and Overwatch 2.

D&D Dice Roller

Roll any combination of polyhedral dice (d4–d100) with modifiers, advantage, and disadvantage.

Character Stat Roller

Roll D&D 5e ability scores using 4d6 drop lowest, standard array, or point buy.

Tournament Bracket ジェネレーター

Create single elimination brackets for 2–16 players. Click to advance winners through the rounds.

Gamer Tag ジェネレーター

Generate unique gamer tags and usernames with styles like Dark, Epic, Funny, and Cute.

Speedrun タイマー

Precision speedrun timer with named splits, spacebar controls, and split time tracking.

Loot Table シミュレーター

Build a loot table with weighted items and simulate hundreds of rolls to see drop rates.

NPC 名前 ジェネレーター

Generate fantasy RPG NPC names for Humans, Elves, Dwarves, Orcs, and more — with personality traits.

RPG Quest ジェネレーター

Generate random tabletop RPG quest hooks with quest giver, objective, location, complication, and reward.

RPG Damage 計算機

Calculate min, max, and average damage for any RPG build — includes crit multiplier, resistance, and DPS.

Tier List メーカー

Create drag-and-drop tier lists with S through F tiers. Add items and rank anything.

ランダム Map Seed ジェネレーター

Generate random seeds for Minecraft, Valheim, Terraria, Stardew Valley, and more. Save your favourites.

Battle シミュレーター

Set up two fighters with stats and simulate turn-based combat. Run 100 battles to see win percentages.

Gaming Loadout ビルダー

Build and share your gaming loadout. Set weapon, armor, gadgets, and perks for any game.

Hex Grid ジェネレーター

Generate interactive hex grids for tabletop RPG maps. Click to fill hexes and add labels.

ヘルス

23 個のツール

Daily Water トラッカー

Track your daily hydration progress with a visual water jug.

TDEE 計算機

Find your Total Daily Energy Expenditure and maintenance calories.

Calories to Steps トラッカー

Calculate how many steps or miles it takes to burn off a specific food.

Body Fat 計算機

Estimate your body fat percentage using the US Navy method.

Lean Body Mass

Determine your lean body mass accurately with the Boer formula.

Water Intake 計算機

Calculate exactly how much water you should drink daily.

One Rep Max (1RM)

Find out your theoretical 1-rep max and lifting percentages.

Running Pace 計算機

Determine your race pace and split times for any distance.

Macro 計算機

Split your daily calories into protein, carbs, and fats.

Target Heart レート Zones

Find your exact target heart rate zones for cardio training.

Period & Ovulation

Track your menstrual cycle and estimate ovulation/fertile days.

BAC 計算機

Calculate your Estimated Blood Alcohol Content (Widmark Formula).

Sleep Cycle 計算機

Calculate the optimal time to go to bed or wake up refreshed.

BMI計算機

体格指数を計算。

Pregnancy 計算機

Estimate due date based on LMP, conception, or IVF transfer.

Ovulation 計算機

Estimate your fertile window and next ovulation dates.

Blood Type Compatibility

Check blood type donation and transfusion compatibility across all 8 types.

Box Breathing Exercise

Follow a guided 4-4-4-4 box breathing animation to reduce stress and improve focus.

Caffeine Half-Life 計算機

Track how caffeine decays in your body and see if it will keep you up at bedtime.

Ideal Weight 計算機

Calculate your ideal body weight using Devine, Robinson, and other medical formulas.

Air Quality Checker

Check real-time air quality index and pollution levels by location using live APIs.

Color Blindness Test

Ishihara-style color blindness test with immediate results and diagnosis.

Pregnancy Due Date

Calculate due date and gestational age from last menstrual period using Naegele's rule.

画像

24 個のツール

QRコードジェネレーター

QRコードを作成。

QRコードスキャナー

画像をアップロードして、ブラウザ上ですぐにQRコードをデコードします。

画像 Metadata ビューアー

Read EXIF metadata and download a stripped, privacy-safe copy of your image.

Batch 画像 リサイザー

Resize multiple images to a maximum width and height in one pass.

Spotify Playlist Cover メーカー

Generate colorful gradients and textured playlist covers.

Profile Picture メーカー

Create a polished circular avatar from any photo with zoom, framing, and ring controls.

Twitch Emote リサイザー

Automatically resize emotes to 112px, 56px, and 28px perfectly.

Pixel Art Avatar ビルダー

Draw 8x8 pixel aesthetics and download them for profile pictures.

EXIF Remover

Inspect and remove privacy-sensitive image metadata before sharing photos publicly.

Image Sharpener

Sharpen slightly soft images with controlled strength before export.

Image Upscaler

Preview larger cleaner image dimensions before export with practical upscale factors.

Background Remover Pro

Preview cleaner subject cutouts with realistic scope notes for simple background-removal workflows.

Background リムーバー

Remove simple solid-color backgrounds and export a transparent PNG.

カラー Blindness シミュレーター

Preview how an uploaded image may appear for protanopia, deuteranopia, tritanopia, and achromatopsia.

Face Blur & Pixelate

Draw privacy boxes over faces or sensitive areas and export a blurred or pixelated image.

画像 コンプレッサー to KB

Compress and resize images to specific file sizes (50KB, 100KB, 200KB). Upload, adjust quality, download instantly. Supports JPG, PNG, WebP.

画像 Resize to KB

Resize and compress images to exact target file sizes like 50KB, 100KB, or 200KB for uploads and web optimization.

画像 Cropper

Crop and rotate images to any dimensions with a visual drag-to-select interface.

画像リサイザー

画像サイズを変更。

画像 Format Exporter

Upload any image and convert it to PNG, JPEG, or WebP format instantly in your browser.

画像 Watermark ツール

Add custom text watermarks to images with adjustable opacity, size, and position.

Device Screenshot Mockup

Place screenshots inside realistic phone, tablet, and laptop device frames.

Social Media 画像 リサイザー

Instantly see the correct image dimensions for Instagram, Facebook, Twitter, and more.

画像圧縮ツール

画像を圧縮。

数学

11 個のツール

Percentage 計算機

Multi-mode percentage calculator. Find X% of Y, X as % of Y, or % change between values.

Mortgage 計算機

Calculate monthly mortgage payments, interest, and amortization.

Bill & Tip Splitter

Split complex restaurant bills and tips evenly across your party.

Smart Tip 計算機

Calculate the tip, split the check, and round totals intelligently for dining out.

通貨換算ツール

通貨を変換。

Loan 計算機

Estimate personal loan and auto loan repayment schedules.

Salary 計算機

Convert between hourly, weekly, monthly, and annual salaries.

年齢計算機

年齢を計算。

Aspect Ratio 計算機

Calculate aspect ratios and resize dimensions proportionally.

Final Grade 計算機

Calculate the minimum final exam score needed to reach your desired course grade.

GPA 計算機

Calculate your semester and cumulative GPA from course grades and credit hours.

音楽

20 個のツール

Virtual Metronome

Simple, accurate BPM metronome for musicians and practice.

BPM Tap Tempo

Tap to the beat and instantly detect the BPM of any song with genre matching.

Chord Progression ジェネレーター

Generate common chord progressions in any key for songwriting and music production.

Focus Sound ジェネレーター

Generate ambient noise with adjustable rain, fireplace, and other soundscapes for focus.

Virtual Metronome

A precise, adjustable BPM metronome with visual beats for music practice.

Guitar Tuner

Tune your guitar with standard EADGBE tuning — play each string note in your browser.

Scale ファインダー

Find notes in any musical scale. Choose root note and scale type to see all scale degrees.

Circle of Fifths

Interactive circle of fifths. Click any key to see key signature, relative minor, and neighbouring keys.

Song Key Transposer

Transpose chords and lyrics to any key. Supports all common chord types including 7ths, sus, and add9.

Drum Pattern ジェネレーター

Create drum patterns with a 16-step sequencer. Play back kick, snare, and hi-hat patterns in your browser.

MIDI Note Lookup

Look up any MIDI note number to get the note name, octave, and frequency in Hz.

Music Interval Trainer

Train your ear by identifying musical intervals. Play two tones and guess the interval.

Songwriting Prompt ジェネレーター

Get random songwriting prompts combining emotion, setting, character, and theme.

Practice Session タイマー

Structured practice timer for musicians. Add timed sections and get audio alerts between them.

Beats Per Bar 計算機

Calculate note durations, beat length, and bar duration for any BPM and time signature.

Key Compatibility チェッカー

Check how compatible two musical keys are for mashups or modulation. See shared chords and pivot points.

Audio Frequency Chart

Visual frequency range reference for common instruments from bass guitar to cymbals.

Music Theory クイズ

Test your music theory knowledge with 10-question quizzes on intervals, chords, and scales.

Setlist プランナー

Plan your band setlist with song durations and energy levels. Auto-arrange for the best show flow.

Tempo Tapper

Tap to find the BPM of any song. Press the button or spacebar repeatedly to calculate tempo.

ネットワーク

19 個のツール

What is my IP?

Instantly view your public IP address, ISP, and geographic location.

Stock Market Hours Check

Check if global stock exchanges (NYSE, TSE, LSE) are currently open.

Cron Job ジェネレーター

Generate and translate crontab expressions with a visual GUI.

cURL to Fetch コンバーター

Convert raw cURL shell commands into JavaScript Fetch or Axios requests.

cURL ビルダー

Visually build cURL commands with headers, params, auth, and JSON bodies.

API Explorer

Send live HTTP requests with custom headers, params, and request bodies.

GraphQL Playground

Run GraphQL queries, mutations, variables, and introspection requests in one place.

WebSocket テスター

Open WebSocket connections, send messages, and inspect live server frames.

Favicon エクストラクター

Extract favicon, apple-touch-icon, and shortcut icon URLs from any website.

Webhook テスター

Fire signed webhook payloads at any endpoint and inspect the response.

HTTP Status Codes

Quick reference for all HTTP status codes with descriptions.

HTTP Status コード チェッカー

Bulk-check live URLs for 200, 301, 404, 500, and other status codes.

リダイレクトチェッカー

リダイレクトをトレース。

IP Geolocation Lookup

Look up the location, ISP, timezone, and coordinates of any IP address. Auto-detects your own IP.

DNS検索

DNSレコードを検索。

SSLチェッカー

SSL証明書を検証。

Cron Next Run 計算機

Enter a cron expression and see the next 10 scheduled run times with a human-readable description.

WHOIS Lookup

Look up domain registration info — registrar, creation date, expiry, nameservers, and status.

Deep リンク ジェネレーター

Build App Store and Play Store deep links with UTM parameters. Generates a QR code automatically.

生産性

13 個のツール

Working Days 計算機

Calculate exactly how many business days are between two dates.

Pomodoro タイマー

Focus timer utilizing the 25/5 minute Pomodoro work protocol.

Meeting ROI 計算機

Calculate exactly how much money a meeting just cost the company.

Bucket List メーカー

Organize your bucket list by category and track which goals you have completed.

Weighted Decision Matrix

Score and compare options against weighted criteria to make better decisions.

Eisenhower Priority Matrix

Organize tasks into urgent/important quadrants to prioritize what matters most.

Email Signature ジェネレーター

Design a professional HTML email signature with customizable colors and social links.

Flashcard Study ツール

Create, flip, and study flashcards with a spaced-repetition scoring system.

Daily Habit トラッカー

Track daily habits on a visual calendar grid and build consistent streaks.

Meeting Cost 計算機

Calculate the real-time dollar cost of a meeting based on attendees and salaries.

Recipe Scaler

Scale recipe ingredient quantities up or down for any number of servings.

Resume Bullet Point ビルダー

Craft impactful resume bullet points using strong action verbs and quantified results.

Wedding Speech ジェネレーター

Generate structured wedding speech outlines for best man, maid of honor, and parents.

SEO

38 個のツール

Sitemap エクストラクター

Fetch and list URLs from a live sitemap.xml file or sitemap index.

robots.txt バリデーター

Fetch or paste a robots.txt file and validate the core crawler directives.

Meta Tag ジェネレーター

Generate perfect SEO meta tags for your web pages.

Open Graph プレビュー

Preview how your page looks when shared on social media.

Robots.txt ジェネレーター

Generate a robots.txt file to control search engine crawling.

Sitemap ジェネレーター

Generate XML sitemaps for better search engine indexing.

SEO タイトル Case コンバーター

Automatically format titles with Chicago/APA style capitalization rules.

Keyword Density チェッカー

Analyze keyword frequency and density in your content.

Search Keyword Combiner

Quickly cross-match permutations of keyword lists for Ad campaigns.

Domain Bulk チェッカー

Generate bulk TLD permutations and bulk search available domains.

Cold Email Subject Scorer

Analyze your cold email subject line for spam triggers and length.

SERP シミュレーター

Preview Google search snippets in desktop and mobile layouts before publishing.

MIME Type Lookup

Look up MIME types by file extension or content type.

Meta Tag Length チェッカー

Visually simulate your Google search snippet truncation limits.

Meta Description ジェネレーター

Generate click-worthy meta descriptions with clean SERP-safe lengths.

Open Graph Card ジェネレーター

Design social share cards and export ready-to-paste OG and Twitter tags.

Canonical URL チェッカー

Inspect live canonical tags, final URLs, and metadata alignment in one pass.

Canonical Tag Generator

Generate clean rel=canonical tags for preferred URLs and duplicate-page control.

Hreflang Tag Generator

Generate alternate-language hreflang tags for international SEO and locale mapping.

Meta Robots Generator

Build robots and googlebot meta tags for indexing, snippet, and crawl-control directives.

Redirect Rule Generator

Generate Apache, Nginx, or CSV redirect rules for migrations, slug changes, and cleanup.

Schema Markup Validator

Validate JSON-LD schema markup syntax and catch common field issues before publishing.

Sitemap バリデーター

Validate sitemap.xml files, detect duplicates, and surface structural issues fast.

Internal リンク アナライザー

Crawl a page’s anchor tags to review internal links, external links, and nofollow usage.

UTM リンク Inspector

Parse campaign URLs and catch missing or messy UTM parameters before launch.

Domain Age チェッカー

Look up RDAP registration data to estimate domain age, registrar, and expiry dates.

Google Ads ジェネレーター

Generate proven high-CTR headlines and descriptions for Google Ads.

Placeholder 画像

Generate placeholder images of any size, color, and format.

FAQ Schema Markup ジェネレーター

Build valid JSON-LD structure data for Search Engine Rich Snippets.

Google SERP Previewer

Visually preview and test Desktop Google Search Results lengths.

Keyword Clustering Tool

Group related keywords into practical topic clusters for SEO planning and content mapping.

Keyword Intent Classifier

Label keywords by likely informational, commercial, transactional, or navigational intent.

Content Brief Generator

Generate lightweight content briefs with title ideas, outlines, and FAQ prompts from a target keyword.

People Also Ask Generator

Generate People Also Ask-style question sets from a target keyword for research and content planning.

TF-IDF Content Analyzer

Analyze content against a target term with a practical V1 term-frequency signal.

Broken Link Checker

Classify URLs by likely healthy, redirecting, or broken status for quick SEO triage.

Hreflang Validator

Validate hreflang code syntax for international SEO workflows and multilingual pages.

Redirect Map Generator

Normalize old and new URL paths for migrations, redirect planning, and content restructures.

セキュリティ

16 個のツール

パスワード Strength Check

Analyze password security with entropy and complexity scoring.

Mnemonic ジェネレーター

Generate secure BIP39-compatible mnemonic recovery phrases.

RSA Key ジェネレーター

Generate secure public and private RSA key pairs locally.

MAC Address ジェネレーター

Generate random Media Access Control (MAC) addresses instantly.

テキスト Obfuscator

Obfuscate text using various encoding and transformation methods.

パスワードジェネレーター

セキュアなパスワードを生成。

ハッシュジェネレーター

MD5、SHAなどのハッシュを生成。

UUIDジェネレーター

一意のIDを生成。

HMAC ジェネレーター

Generate HMAC signatures using various hash algorithms.

ランダム 数字 ジェネレーター

Generate random numbers, dice rolls, and coin flips.

ランダム String ジェネレーター

Generate cryptographically secure random strings for API keys, tokens, and test data.

暗号化ツール

テキストを暗号化復号化。

Bcryptジェネレーター

Bcryptハッシュを生成。

TOTP コード ジェネレーター

Generate time-based one-time passwords for 2FA testing.

Steganography ツール

Hide secret messages inside PNG images using LSB steganography, or decode hidden messages from images.

ファイル Hash チェッカー

Compute MD5, SHA-1, SHA-256, and SHA-512 hashes for any file. Compare against a known hash to verify integrity.

ソーシャルメディア

25 個のツール

YouTube タイトル CTR テスター

Analyze your video titles for power words, length, and CTR potential.

TikTok Viral Hook ジェネレーター

Generate high-retention opening hooks for Short-form video.

YouTube Thumbnail Grabber

Extract high-resolution video covers instantly.

YouTube Transcript エクストラクター

Extract a clean, AI-ready transcript from any YouTube video URL instantly.

Instagram Caption Pro

Fix spacing & line break issues for IG captions.

Instagram Grid Splitter

Slice a large panoramic image into 9 perfect squares.

TikTok Caption カウンター

Track character limits and hashtag counts for TikTok.

X Thread メーカー

Split long text into numbered tweets automatically.

Twitch Alias Forge

Generate creative gaming usernames for streaming.

Tweet Intent ジェネレーター

Create shareable Twitter links with pre-filled text.

Social Post Previewer

Preview one post across X, LinkedIn, Facebook, and Instagram-style layouts.

LinkedIn Rich テキスト Stylizer

Add bold and italic text to your LinkedIn posts.

Auto-Caption フォーマッター

Break sentences into 3-word chunks for viral Short-form videos.

Creator Revenue 計算機

Estimate your true Patreon and Substack revenue after platform fees.

Discord Timestamp ジェネレーター

Generate localized, dynamic Markdown time syntax for Discord chats.

YouTube Idea Slot Machine

Generate massive viral hooks by combining proven psychological triggers.

Instagram Line Break ツール

Fix invisible line break formatting issues in Instagram captions and bios.

LinkedIn Bold テキスト フォーマッター

Format LinkedIn posts with bold and italic Unicode text to stand out in the feed.

TikTok Character カウンター

Count characters, hashtags, and mentions against TikTok caption limits in real time.

Tweet リンク ジェネレーター

Generate pre-filled Twitter/X share links with custom text, mentions, and hashtags.

Twitch Username ジェネレーター

Generate creative gaming and streaming usernames with prefixes, suffixes, and styles.

Twitter Thread Splitter

Split long text into numbered tweet-sized chunks with character count tracking.

YouTube Thumbnail ダウンローダー

Download YouTube video thumbnails in all available resolutions from any video URL.

Instagram Bio Generator

Generate creative Instagram bios for different niches including creative, business, fitness, lifestyle.

TikTok Username Generator

Generate creative TikTok usernames in multiple styles including trendy, gaming, creative, music.

テキスト

30 個のツール

Emoji Search & Copy

Find and copy any emoji instantly from a organized search grid.

Bionic Reading テキスト

Enhance reading speed by highlighting fixation points in text.

Bubble テキスト ジェネレーター

Convert normal text into ⓐⓔⓢⓣⓗⓔⓣⓘⓒ bubble and block styles.

Morse コード コンバーター

Convert text to Morse code signals and vice versa.

単語カウンター

単語と文字をカウント。

Lorem Ipsum ジェネレーター

Generate placeholder text in paragraphs, sentences, or words.

Case コンバーター

Convert text between UPPER, lower, Title, Sentence, and more.

Markdown to HTML

Convert Markdown to clean HTML with live preview.

Duplicate Line リムーバー

Remove duplicate lines from your text instantly.

Slugジェネレーター

URL Slugを作成。

テキスト Reverser

Reverse text by characters, words, or lines.

Find & Replace

Find and replace text with regex support and match highlighting.

テキスト to Binary

Convert text to binary, hex, octal, and decimal representations.

Line ソーター

Sort lines alphabetically, numerically, by length, or randomly.

Character Frequency

Analyze the frequency of characters inside any text block.

Fancy Font ジェネレーター

Convert text to mathematical bold serif display characters.

Cursive テキスト ジェネレーター

Convert normal text into script and cursive unicode characters.

Upside Down テキスト

Flip your text upside down instantly to mock your friends.

Vaporwave テキスト ジェネレーター

Convert standard text into full-width aesthetic vaporwave text.

Braille Translator

Translate English text to Grade 1 Braille and vice versa.

Emoji Translator

Automatically substitute keywords in text with matching emojis.

テキスト Cleaner

Remove annoying line breaks and redundant whitespaces from text.

Y2K Aesthetic テキスト ジェネレーター

Convert plain text into sparkly, bracketed, vaporwave 2000s text.

Kaomoji / Lenny Faces

Quickly find and copy famous ASCII text Lenny faces and Kaomoji.

ASCII Block テキスト ジェネレーター

Convert normal text into massive ASCII block art formats.

Zalgo Glitch テキスト ジェネレーター

Create cursed, glitched text to copy and paste anywhere.

NATO Phonetic Alphabet

Convert any text to NATO phonetic alphabet (Alpha, Bravo, Charlie...). Covers A-Z, digits, and punctuation.

Wingdings Translator

Convert text to Wingdings symbols and back. See the full character mapping table.

Pig Latin コンバーター

Translate any English text to Pig Latin with proper consonant cluster rules and capitalization handling.

Dictionary Lookup

Find word definitions, phonetics, example usage, and pronunciations instantly.

時間

12 個のツール

Days Between Dates

Calculate the exact number of days, weeks, and months between two dates.

時間 Duration 計算機

Find the hours and minutes between a start and end time.

Day/日付 Math 計算機

Add or subtract days, weeks, and months from a specific date.

Leap Year チェッカー

Check if a year is a leap year and find out when the next ones are.

オンライン Stopwatch

A precise lap stopwatch with millisecond accuracy.

Countdown タイマー

Live countdown timer to a specific date and time.

日付 Difference 計算機

Calculate the exact difference between two dates.

時間 Zone コンバーター

Visual comparison of global times and zones.

Public Holiday Checker

Find all public holidays for any country and year with dates and holiday types.

Sunrise & Sunset Times

Find sunrise, sunset, and total day length for any location based on date and coordinates.

Holiday Countdown

Count down the days, hours, minutes, and seconds until any major holiday or custom date.

Weather Lookup

Get real-time weather, temperature, wind speed, humidity, and visibility for any location.

ライティング

17 個のツール

Read 時間 計算機

Estimate article reading time, speaking time, and live text stats.

単語 Frequency アナライザー

Find the most repeated words in any text with live frequency charts.

Rhyming Dictionary

Find perfect rhymes for writing poetry or lyrics.

Essay Typer

Mash your keyboard to produce a perfect academic essay.

AI Prompt ジェネレーター

Roll randomized art styles to use in Midjourney or DALL-E.

Readability アナライザー

Calculate Flesch-Kincaid reading ease and target grade levels.

Syllable カウンター

Count syllables per word for writing haikus or structured poetry.

Simple Paraphraser

Swap basic English attributes and adjectives with synonyms.

Grammar & Typo チェッカー

Quickly scan for standard and notorious spelling mistakes.

Corporate Jargon デコーダー

Translate annoying passive-aggressive corporate speak into plain English.

テキスト Summary / TL;DR

Summarize long text into fast bullet points or a short paragraph.

Grammar & Style Fixer

Clean up rough drafts, obvious typos, and awkward phrasing instantly.

Sentence Length アナライザー

Analyze sentence rhythm, pacing, and readability by sentence length.

Acronym Explainer

Detect acronyms in text and explain common business, marketing, and tech terms.

ランダム Poem ジェネレーター

Generate random poems in various styles including haiku, limerick, and free verse.

Story Plot ジェネレーター

Generate random story plots with characters, settings, and conflicts for creative writing.

剽窃チェッカー

剽窃をチェック。