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A comprehensive collection of tools used daily in software development: JSON formatting and validation, regex testing, Base64 encoding/decoding, UUID generation, timestamp conversion, SQL formatting, YAML-JSON conversion, and more. Verify API responses and convert data formats entirely in your browser.
Format, minify, validate, and display JSON data in tree view.
Test regular expression patterns in real-time. Supports matching, group extraction, and replacement.
Generate SEO meta tags easily. Supports Open Graph and X (Twitter) Card.
Convert between text and Base64. Supports standard and URL-safe modes.
Generate OGP tags for social sharing. Preview for Facebook, X, LINE, and LinkedIn.
Encode and decode URL strings. Safely convert special characters in query parameters and paths.
Encode and decode HTML entities. Switch between minimal, named, and numeric modes for different use cases.
Generate UUID v4, UUID v7, and ULID. Supports batch generation and various format options.
Convert between Unix timestamps and human-readable dates. Supports ISO 8601, RFC 2822, and more.
Format, minify, and syntax highlight SQL queries. Supports MySQL, PostgreSQL, SQL Server, Oracle, and SQLite.
Convert between YAML and JSON formats. Auto-detects input format.
Convert between CSV and JSON formats. Easily perform format conversions frequently needed for data analysis and API integration in your browser.
Convert Markdown to HTML. Supports GFM (GitHub Flavored Markdown) including tables, task lists, and strikethrough.
Convert between binary, octal, decimal, and hexadecimal. Instantly convert number systems with auto-detection and live results.
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hash values from text.
Convert between HEX, RGB, HSL, and CMYK color formats. Essential tool for designers and developers.
Decode JSON Web Tokens (JWT) and view header, payload, and signature. Check token expiration.
Parse cron expressions and view human-readable descriptions with next execution times.
Compare two pieces of code and highlight additions, deletions, and changes. Supports Unified, Side-by-side, and Inline view modes.
Convert between XML and JSON formats. Auto-detects input format.
Parse User-Agent strings to identify browser, OS, device type, and rendering engine.
Generate cryptographically secure random strings. For API keys, tokens, and test data.
Check color contrast ratio against WCAG standards. Includes AA/AAA compliance testing and improvement suggestions.
Calculate MD5, SHA-1, SHA-256 hash values for files and verify integrity with checksum comparison.