JWT Secret Key Generator & Decoder

Free offline toolbox: JWT secret key generator, JWT decoder, UUID v4, Base64 and SHA hashes. 100% local, no tracking.

JWT Secret Key Generator & Decoder puts the developer security tools you use every day one click away, and everything runs offline inside your browser. TOOLS • JWT Decoder – inspect the header, payload and time claims (exp, nbf, iat) with active or expired status. Decoding is not verification: the signature is never checked. • JWT Secret Generator – 128 to 512-bit secrets in hex, Base64 or Base64URL, generated with the Web Crypto API. • UUID v4 Generator – up to 20 at once, with or without hyphens. • Base64 / Base64URL – encode and decode with full UTF-8 support. • Hash Generator – SHA-256, SHA-384, SHA-512 and SHA-1, computed locally. RIGHT-CLICK SHORTCUTS Select text on any page, then choose: Decode as JWT, SHA-256 of selection, or Base64 decode selection. PRIVACY • No network requests, no analytics, no ads, no tracking. • Nothing you paste or generate is stored or sent anywhere. • Only two permissions: contextMenus and storage. By jwtsecretkey.com – more tools and guides on the website.