Encode & Decode Tools – Base64, URL, JWT, Unicode

Quick encoders and decoders for the formats that show up in headers, URLs, tokens and logs. Everything is handled as UTF-8 and processed locally, so it is safe to paste tokens and credentials.

B64 Base64 Encode / Decode Encode text to Base64 or decode Base64 back to text. Full UTF-8 support (emoji, Chinese), URL-safe variant, and file to Base64 conversion. %20 URL Encode / Decode Percent-encode or decode URLs and query parameters, and break any URL into its parts and query string — in your browser. JWT JWT Decoder Decode a JSON Web Token to see its header, payload and claims. Shows expiry status and readable dates for exp, iat and nbf. Tokens never leave your browser. 0x Number Base Converter Convert numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36 — with arbitrary precision, digit grouping and two’s-complement view. \u HTML Entity & Unicode Escape Encode and decode HTML entities, convert text to and from Unicode escapes (\uXXXX, \u{…}, Python, CSS), escape JSON strings, and inspect hidden characters such as zero-width spaces.