Developer Tools
Formatters, encoders and utilities for developers and makers.
JSON Formatter and Validator
Beautify, minify and validate JSON instantly — with clear error messages when something is off.
Base64 Encoder and Decoder
Encode and decode Base64 strings in your browser, with full UTF-8 support.
QR Code Generator
Turn any URL, text or contact info into a scannable QR code — download it in seconds.
Unix Timestamp Converter
Convert any Unix timestamp to a readable date — or any date to a timestamp — in milliseconds, seconds and more.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 cryptographic hashes instantly — runs entirely in your browser, nothing sent to any server.
UUID Generator
Generate unique UUIDs instantly — one at a time or in bulk.
CSV ↔ JSON Converter
Convert between CSV and JSON instantly — paste, upload, transform, download.
Text Diff Checker
Paste two versions of any text and instantly see every difference highlighted in color.
Chart & Graph Maker
Turn your data into beautiful charts — free, instant, no signup.
Regex Tester
Write, test and debug regular expressions in real time — free and instant.
Markdown Editor & Preview
Write Markdown, see your HTML instantly — free, no account, no limits.
Favicon Generator
Turn any image or emoji into a complete favicon set — free and instant.
Cron Expression Builder
Build cron schedules visually — get the expression, the description, and the next run times instantly.
CSS Box Shadow Generator
Design multi-layer box shadows visually and copy production-ready CSS instantly.