Security & Encoding
Decode JWTs, generate hashes, and encode or decode Base64, URLs, and HTML.
JWT Decoder
Decode JWT headers, payloads, and claims — entirely in your browser.
Security & Encoding
JWT Generator
Create and sign JSON Web Tokens with HS256, HS384, or HS512.
Security & Encoding
Base64 Encoder / Decoder
Encode and decode Base64 text with full UTF-8 support.
Security & Encoding
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes with Web Crypto.
Security & Encoding
URL Encoder / Decoder
Percent-encode and decode URLs and query string components.
Security & Encoding
HTML Encoder / Decoder
Convert text to HTML entities and decode entities back to text.
Security & Encoding