Encoders & Decoders

Base64, URL, HTML entities, JWT, Unicode and hashing.

• JSON Escape / Unescape — Escape text into a JSON string literal, or unescape nested stringified JSON.
• Base64 — Encode and decode Base64 / Base64URL text and files, Unicode-safe.
• URL Encoder / Decoder — Percent-encode and decode URI components with malformed-escape detection.
• HTML Entities — Escape text into HTML-safe entities and decode named or numeric entities.
• JWT Decoder — Decode JWT header and claims, explain expiry, and optionally verify signatures.
• Unicode Escapes — Convert text to code points and \u, \x, &#x; or U+ escapes — and back.
• Text ⇄ Binary / Hex — Represent text as binary, hex, octal or decimal bytes and convert back.
• UTF-8 Inspector — Hex dump of UTF-8 / ASCII bytes alongside the characters they encode.
• Hash Generator — SHA-1/256/384/512 digests and HMACs via Web Crypto, plus MD5 as a legacy checksum.
• Data URI — Create data: URIs from files or text and decode them with a safe preview.
• Number Base Converter — Arbitrary-precision conversion between binary, octal, decimal, hex and bases 2–36.