Small, fast, single-purpose tools. Most run entirely in your browser — nothing typed is sent anywhere; the AI-powered ones send only what's needed to generate your result.
Pretty-print, minify, and validate JSON instantly — with the exact error location on invalid input.
Convert text to and from Base64, entirely in your browser. Nothing is sent anywhere.
Test a JavaScript regular expression against sample text and see every match highlighted live.
Generate RFC 4122 v4 UUIDs, one at a time or in bulk, ready to copy.
Convert between Unix epoch time and human-readable dates, in any timezone.
Type any topic and get a free, one-page AI-generated cheat sheet PDF, instantly.
Time and space complexity for every common data structure and sorting algorithm, in one table.
Convert between binary, octal, decimal and hex — plus the bitwise ops LeetCode keeps asking about.
Decode a JSON Web Token's header and payload and check whether it has expired. Nothing leaves your browser.
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text, using your browser's own crypto.
Percent-encode and decode URLs and query strings, component-safe or full-URI.
Switch text between camelCase, snake_case, kebab-case, PascalCase and CONSTANT_CASE.
Compare two blocks of text or code line by line and see exactly what was added or removed.
Write Markdown and see the rendered result side by side, live.
Turn any link or text into a QR code and download it as a PNG or print-ready SVG.
