Developer tools that run in your browser
No sign-up, no server round-trip, no tracking of what you type. Pick a tool below.
JSON Formatter & Validator
Pretty-print, minify, and validate JSON with clear error locations.
Base64 Encode / Decode
Convert text to and from Base64, including UTF-8 safe handling.
UUID Generator
Generate random v4 UUIDs, one at a time or in bulk.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates, any timezone.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of text, in your browser.