Developer utilities

Encoders, hashes and generators for everyday web development. Everything runs in your browser.

Web and URL

URL Encode / DecodePercent-encode or decode URLs and query strings in your browser. Component and full-URI modes, form encoding, and a query parameter editor.
HTML Entity Encode / DecodeEncode text as HTML entities (named, decimal or hex), or decode all 2,231 HTML named references, with a safe preview.

Encoders

Base64 Encode / DecodeEncode and decode Base64 and Base64URL text and files in your browser, with alphabet detection, MIME wrapping and data: URIs.
JSON String EscaperEscape text for a JSON string, or unescape it and format nested JSON, with ready-quoted output for bash and PowerShell.

Tokens

JWT DecoderDecode the header and claims of a JSON Web Token locally. Nothing is sent anywhere.

Hashing

Hash and Checksum GeneratorCalculate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC-32 hashes and HMACs of text or files, entirely in your browser.

Generators