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High-speed, browser-based tools for Developer. None of your data ever leaves your computer.
Compare two text or code files with instant side-by-side and inline visual diffs, character-level additions and deletions, and line statistics.
Generate SHA-256, SHA-512, SHA-384, SHA-1, and MD5 hashes for text and files directly in your browser.
Decode, inspect, and validate JSON Web Tokens (JWT) client-side. Parse header, payload claims, and expiration timestamps.
Write GitHub-flavored Markdown with real-time split preview, syntax toolbar, tables, code blocks, and 1-click HTML code export and download.
Generate strong, cryptographically secure random passwords, memorable passphrases, and PINs. Includes real-time entropy calculation and bulk export.
Generate custom high-resolution QR codes for websites, plain text, WiFi credentials, and contact cards. Customize colors and download lossless PNG or SVG.
Test, debug, and visualize JavaScript regular expressions with real-time match highlighting, capture group inspection, and string substitution.
Format, beautify, and indent messy SQL queries locally in your browser. Supports Standard SQL, MySQL, PostgreSQL, BigQuery, and SQLite with keyword capitalization and custom indentation.
Encode, decode, parse, and rebuild URLs and query string parameters client-side with full UTF-8 support.
Generate bulk cryptographically secure UUID v4 identifiers directly in your browser.