所有工具

浏览我们完整的 429 个免费在线工具合集。

颜色

11 个工具

颜色转换器

转换颜色格式。

Palette Generator

Generate beautiful, harmonious color palettes from a seed color.

渐变生成器

创建CSS渐变。

对比度检查器

检查颜色对比度。

Tailwind Color Finder

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

Box Shadow Generator

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

Image Color Palette Extractor

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

Image Color Picker

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

Color Shade Generator

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.

Color Temperature Converter

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

Content

20 个工具

HTML Link-in-Bio Builder

Generate a blazing fast static HTML alternative to Linktree.

Podcast Show Notes Builder

Generate rich markdown show notes with timestamps and resource links.

Email Preheader Generator

Generate stronger inbox preview text that complements your subject line.

Startup Name Availability Checker

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

UTM Tracking Builder

Standardize your marketing attribution links.

Link-in-Bio Generator

Create a simple static HTML profile page.

Hashtag Group Generator

Curated hashtag clusters to boost organic reach.

Text to Hashtags

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

Thread to Tweet Converter

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

Bio Generator for Social

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

Email Subject Line Tester

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

Rap Name Generator

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

Bio Link Page Builder

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

Blog Title Generator

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

Business Name Generator

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

Engagement Rate Calculator

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

Hashtag Generator

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

Headline Analyzer

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

Slogan Generator

Generate catchy marketing slogans and taglines from your brand keywords.

UTM Link Builder

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

转换器

21 个工具

长度转换器

转换长度。

重量转换器

转换重量。

温度转换器

转换温度。

Volume Converter

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

Area Converter

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

Speed Converter

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

Digital Storage Converter

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

Time Converter

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

单位转换器

转换单位。

Byte Converter

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

HEIC to JPG / PNG Converter

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

Image Format Converter

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

Fuel Economy Converter

Convert between MPG and L/100km.

Shoe Size Converter

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

Bra Size Converter

Translate global bra sizing conventions.

Ring Size Converter

Standardize ring sizes across regions and diameters.

Excel / CSV to PDF Converter

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

Cooking Measurement Converter

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

Digital Storage Converter

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

Roman Numeral Converter

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

Shoe Size Converter

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

Data

25 个工具

JSON Validator & Formatter

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

Base64转图片

转换为图片。

图片转Base64

转换为Base64。

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 Generator

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

.env File Validator

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

CSV转JSON

CSV转JSON。

XML Formatter

Format, validate and prettify raw XML documents.

JSON格式化工具

格式化和验证JSON数据。

Base64 Encoder/Decoder

Encode and decode strings to and from Base64 format.

URL编码器

为网页编码URL。

SQL格式化器

格式化SQL代码。

Number Base Converter

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

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back.

JSON转CSV

JSON转CSV。

YAML转JSON

YAML转JSON。

Binary-Decimal-Hex Converter

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

JWT Builder

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

Unicode Inspector

Paste any text and inspect each character's Unicode codepoint, name, decimal, hex, and HTML entity.

Number to Words

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

Barcode Generator

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

Fake Dataset Generator

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

开发者

33 个工具

HTML Formatter

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 Converter

Convert color values between RGB blocks and standard Hex codes.

PX to REM Converter

Translate CSS pixel constraints to accessibility-standard rem ratios.

CSS Formatter

Beautify nested and unformatted CSS code blocks securely.

CSS Box Shadow Generator

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

Markdown Table Generator

Construct MD tables visually without writing the tedious syntax manually.

Regex Explain Tool

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

SVG to JSX Converter

Convert raw SVG code into a React JSX component instantly.

正则表达式测试器

测试正则表达式。

HTML Entity Tool

Encode and decode HTML entities for safe web content.

CSS压缩器

压缩CSS代码。

JS Minifier

Minify JavaScript code by removing whitespace and comments.

Glassmorphism Generator

Design frosted glass CSS UI components with a visual editor.

Neumorphism UI Generator

Design soft UI CSS components instantly with a visual editor.

文本比较器

比较两个文本。

Tailwind UI Visualizer

Paste Tailwind HTML and view a sandboxed live preview instantly.

React to Vue Converter

Convert functional React components to Vue 3 Composition API.

Extension Manifest Builder

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 Page Number 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 Optimizer & Minifier

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

Chmod Calculator

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

CSS Flexbox Generator

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

Favicon Generator

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

HTML to Markdown Converter

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 Generator

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

CSS Clip-Path Generator

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

Visual Regex Tester

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

Text Diff Merger

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

财务

33 个工具

Freelance Rate Calculator

Calculate your true required hourly rate based on target income.

Wedding Budget Planner

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 Calculator

Calculate future wealth using a Systematic Investment Plan.

Lumpsum Calculator

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

ROI Calculator

Calculate Return on Investment and annualized gains.

Income Tax Calculator

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

Net Worth Calculator

Track assets vs liabilities to determine your true net worth.

Retirement Calculator

Project 401k savings and compound interest for retirement.

Auto Loan Payoff

Calculate interest saved by making extra monthly car payments.

Inflation Calculator

Measure the historical or projected purchasing power of money.

SaaS Churn Calculator

Calculate customer churn rate and projected user numbers.

Rent vs Buy Calculator

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

Cost Per Wear Calculator

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

FIRE Retirement Calculator

Calculate your exact Financial Independence, Retire Early number.

Crypto Profit Calculator

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

CAGR Calculator

Find the Compound Annual Growth Rate of an investment.

Markup / Margin Calculator

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 Calculator

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

Amazon Fee Calculator

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

Latency Cost Calculator

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

Subscription vs One-Time Cost Calculator

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

Lead Value Calculator

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

Electricity Cost Calculator

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

EMI Calculator

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

Expense Ratio Impact Calculator

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

Gas Trip Cost Calculator

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

Invoice Generator

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

Paycheck Calculator

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

Rent Affordability Calculator

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

Startup Runway Calculator

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

Stock Return Calculator

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

Fun

26 个工具

Spin the Wheel

A customizable random picker wheel for decisions and games.

抛硬币

抛硬币。

掷骰子

掷骰子。

Fake Person Generator

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

Fake iOS Message Generator

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? Quiz

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

Color 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 Maker

Create authentic 2013-era doge memes with Comic Sans.

Fortune Cookie Spinner

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

Affirmation Generator

Generate daily positive affirmations to boost confidence and motivation.

Fake Identity Generator

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

Mad Libs Word 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 Text Generator

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

Random Name Picker

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

Number Guessing Game

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

Reaction Time 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 Generator

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

Word 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.

Color Blind Test

Test your color vision and hue spotting ability.

游戏

25 个工具

Typing Speed Test

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

Word 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's and O's game against an AI or a friend.

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!

Gaming

15 个工具

FPS Sensitivity Converter

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 Generator

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

Gamer Tag Generator

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

Speedrun Timer

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

Loot Table Simulator

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

NPC Name Generator

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

RPG Quest Generator

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

RPG Damage Calculator

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

Tier List Maker

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

Random Map Seed Generator

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

Battle Simulator

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

Gaming Loadout Builder

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

Hex Grid Generator

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

健康

20 个工具

Daily Water Tracker

Track your daily hydration progress with a visual water jug.

TDEE Calculator

Find your Total Daily Energy Expenditure and maintenance calories.

Calories to Steps Tracker

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

Body Fat Calculator

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 Calculator

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 Calculator

Determine your race pace and split times for any distance.

Macro Calculator

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

Target Heart Rate Zones

Find your exact target heart rate zones for cardio training.

Period & Ovulation

Track your menstrual cycle and estimate ovulation/fertile days.

BAC Calculator

Calculate your Estimated Blood Alcohol Content (Widmark Formula).

Sleep Cycle Calculator

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

BMI计算器

计算体质指数。

Pregnancy Calculator

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

Ovulation Calculator

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 Calculator

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

Ideal Weight Calculator

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

Image

20 个工具

二维码生成器

创建二维码。

二维码扫描器

上传图片，在浏览器中即时解码二维码。

Image Metadata Viewer

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

Batch Image Resizer

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

Spotify Playlist Cover Maker

Generate colorful gradients and textured playlist covers.

Profile Picture Maker

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

Twitch Emote Resizer

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

Pixel Art Avatar Builder

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

Background Remover

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

Color Blindness Simulator

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.

Image Compressor to KB

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

Image Resize to KB

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

Image Cropper

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

图片调整器

调整图片大小。

Image Format Exporter

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

Image Watermark Tool

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 Image Resizer

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

图片压缩器

压缩图片。

数学

11 个工具

Percentage Calculator

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

Mortgage Calculator

Calculate monthly mortgage payments, interest, and amortization.

Bill & Tip Splitter

Split complex restaurant bills and tips evenly across your party.

Smart Tip Calculator

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

货币转换器

转换货币。

Loan Calculator

Estimate personal loan and auto loan repayment schedules.

Salary Calculator

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

年龄计算器

计算年龄。

Aspect Ratio Calculator

Calculate aspect ratios and resize dimensions proportionally.

Final Grade Calculator

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

GPA Calculator

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

Music

20 个工具

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 Generator

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

Focus Sound Generator

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 Finder

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 Generator

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 Generator

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

Practice Session Timer

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

Beats Per Bar Calculator

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

Key Compatibility Checker

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 Quiz

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

Setlist Planner

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.

Network

19 个工具

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 Generator

Generate and translate crontab expressions with a visual GUI.

cURL to Fetch Converter

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

cURL Builder

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 Tester

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

Favicon Extractor

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

Webhook Tester

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 Code Checker

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

重定向检查器

跟踪重定向。

IP Geolocation Lookup

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

DNS查询

查询DNS记录。

SSL检查器

验证SSL证书。

Cron Next Run Calculator

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 Link Generator

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

Productivity

13 个工具

Working Days Calculator

Calculate exactly how many business days are between two dates.

Pomodoro Timer

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

Meeting ROI Calculator

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

Bucket List Maker

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 Generator

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

Flashcard Study Tool

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

Daily Habit Tracker

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

Meeting Cost Calculator

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 Builder

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

Wedding Speech Generator

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

SEO

25 个工具

Sitemap Extractor

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

robots.txt Validator

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

Meta Tag Generator

Generate perfect SEO meta tags for your web pages.

Open Graph Preview

Preview how your page looks when shared on social media.

Robots.txt Generator

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

Sitemap Generator

Generate XML sitemaps for better search engine indexing.

SEO Title Case Converter

Automatically format titles with Chicago/APA style capitalization rules.

Keyword Density Checker

Analyze keyword frequency and density in your content.

Search Keyword Combiner

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

Domain Bulk Checker

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 Simulator

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 Checker

Visually simulate your Google search snippet truncation limits.

Meta Description Generator

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

Open Graph Card Generator

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

Canonical URL Checker

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

Sitemap Validator

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

Internal Link Analyzer

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

UTM Link Inspector

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

Domain Age Checker

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

Google Ads Generator

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

Placeholder Image

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

FAQ Schema Markup Generator

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

Google SERP Previewer

Visually preview and test Desktop Google Search Results lengths.

安全

16 个工具

Password Strength Check

Analyze password security with entropy and complexity scoring.

Mnemonic Generator

Generate secure BIP39-compatible mnemonic recovery phrases.

RSA Key Generator

Generate secure public and private RSA key pairs locally.

MAC Address Generator

Generate random Media Access Control (MAC) addresses instantly.

Text Obfuscator

Obfuscate text using various encoding and transformation methods.

密码生成器

生成安全密码。

哈希生成器

生成MD5、SHA等哈希。

UUID生成器

生成唯一标识符。

HMAC Generator

Generate HMAC signatures using various hash algorithms.

Random Number Generator

Generate random numbers, dice rolls, and coin flips.

Random String Generator

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

加密工具

加密和解密文本。

Bcrypt生成器

生成Bcrypt哈希。

TOTP Code Generator

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

Steganography Tool

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

File Hash Checker

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

文本

29 个工具

时间

8 个工具

Writing

17 个工具