Encoders / Decoders
Encoders and decoders convert data between raw text and text-safe transport formats. Use them to Base64-encode a value, percent-encode a URL, or decode a JWT, all locally in your browser.
Base64 Encoder & Decoder
Encode and decode Base64 text and files
JWT Decoder
Decode, inspect, and verify JSON Web Tokens
URL Encoder & Decoder
Encode and decode URL components
Encoders / Decoders guides
- What is Base64 encoding? A complete guideBase64 explained: what it is, how three bytes become four characters, why output is 33% larger, padding, URL-safe Base64, and why it is not encryption.4 min read
- How JSON Web Tokens (JWT) workUnderstand JWTs: the header, payload, and signature, how signing and verification work, standard claims, HS256 vs RS256, and common security mistakes.4 min read
- URL encoding explained (percent-encoding)What URL encoding is, why it is needed, reserved vs unreserved characters, encodeURIComponent vs encodeURI, %20 vs +, and how to build query strings correctly.3 min read