Developer tools

Everyday utilities, zero tracking.

Fast, free tools for the small jobs that interrupt real work. Everything runs locally in your browser, so nothing you paste is sent to a server.

100% client-side

JSON Formatter & Validator

Pretty-print, minify and validate JSON with precise error locations.

JWT Decoder

Inspect a JSON Web Token's header, claims and expiry.

Base64 Encoder / Decoder

Encode and decode UTF-8 safe Base64, including URL-safe variants.

URL Encoder & Parser

Encode or decode URL components and break a URL into its parts.

UUID Generator

Generate cryptographically random v4 UUIDs in bulk.

Hash Generator

SHA-1, SHA-256, SHA-384 and SHA-512 hashes with the Web Crypto API.

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates.

Regex Tester

Test JavaScript regular expressions with live match highlighting.

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