validation
14 tools with this tag
Password Strength Check
Analyze password security with entropy and complexity scoring.
SecurityJSON Validator & Formatter
Validate syntax, catch errors, and auto-indent complex JSON payloads.
DataLeap Year Checker
Check if a year is a leap year and find out when the next ones are.
Timerobots.txt Validator
Fetch or paste a robots.txt file and validate the core crawler directives.
SEO.env File Validator
Audit, validate, and alphabetically sort your environment variables safely.
DataGrammar & Typo Checker
Quickly scan for standard and notorious spelling mistakes.
WritingContrast Checker
Check color contrast ratios for WCAG accessibility compliance.
ColorHTTP Status Code Checker
Bulk-check live URLs for 200, 301, 404, 500, and other status codes.
NetworkMeta Tag Length Checker
Visually simulate your Google search snippet truncation limits.
SEOCanonical URL Checker
Inspect live canonical tags, final URLs, and metadata alignment in one pass.
SEOSitemap Validator
Validate sitemap.xml files, detect duplicates, and surface structural issues fast.
SEOUTM Link Inspector
Parse campaign URLs and catch missing or messy UTM parameters before launch.
SEOSSL Certificate Checker
Check SSL certificate details for any domain — issuer, expiry date, and days remaining.
NetworkFile Hash Checker
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes for any file. Compare against a known hash to verify integrity.
Security