Developer Tools
Format, validate, encode, decode and inspect development data with focused utilities. Test generated output outside production and never paste live secrets or private keys.
Base64 Encoder Decoder
Encode and decode Base64 text instantly.
Color Contrast Checker
Check WCAG contrast ratio between two colors.
Cron Expression Generator
Build common cron expressions quickly.
CSR Generator
Generate a private key and certificate signing request in your browser.
CSS Beautifier
Beautify and format CSS code.
CSS Minifier
Minify CSS code instantly.
CSV to JSON Converter
Convert CSV rows into formatted JSON objects.
Font Converter
Convert TTF, OTF, WOFF and WOFF2 fonts locally.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes.
HTML Beautifier
Beautify and indent your HTML code.
HTML Email Preview
Preview responsive HTML email code safely in a sandbox.
HTML Error Validator
Check a public page with the W3C-compatible Nu validation service.
HTML Minifier
Minify HTML code instantly.
JS Minifier
Minify JavaScript code instantly.
JSON Formatter
Format, validate, minify, and copy JSON.
JSON to CSV Converter
Convert an array of JSON objects into CSV.
JWT Decoder
Decode JWT header and payload safely.
Lorem Ipsum Generator
Generate placeholder text for layouts.
Password Generator
Generate secure random passwords.
Regex Tester
Test regular expressions against sample text.
SQL Formatter
Format and indent SQL queries for easier reading.
SSL Certificate Decoder
Decode a pasted PEM certificate without transmitting it.
Timestamp Converter
Convert Unix timestamps and readable dates.
URL Encoder Decoder
Encode and decode URLs or query strings.
UUID Generator
Generate random UUID v4 values.
ZIP / TAR Archive Converter
Convert between ZIP and uncompressed TAR archives locally.
ZIP File Creator
Compress multiple files into a ZIP archive in your browser.
ZIP File Extractor
Inspect and securely extract selected ZIP contents.