Free online Fernet encoder — generate Fernet encrypted tokens instantly in your browser. No data is stored. Uses AES-128-CBC encryption with HMAC-SHA256 authentication, auto-generates or accepts a 32-byte symmetric key.
Plaintext to encrypt
Base64-encoded 32-byte Fernet key (leave empty to auto-generate)
Free online Fernet encoder — generate Fernet encrypted tokens instantly in your browser. No data is stored. Uses AES-128-CBC encryption with HMAC-SHA256 authentication, auto-generates or accepts a 32-byte symmetric key.
Runs entirely in your browser. No data is sent to our servers.
Generate a Fernet token encrypting sensitive data with an auto-generated key
JWT Decoder
Free online JWT decoder — decode JWT tokens into header, payload, and signature instantly in your browser. No data is stored. Parses base64url-encoded header and payload claims, displays the raw signature.
JWT Encoder
Free online JWT encoder — create HMAC-signed JWT tokens instantly in your browser. No data is stored. Supports HS256, HS384, and HS512 algorithms with configurable secret key.
JWT Debugger
Free online JWT debugger — analyze JWT tokens for expiry, format, and claims problems instantly in your browser. No data is stored. Detects expired tokens, missing claims, invalid algorithms, malformed headers, and structural issues.
JWT Expiry Checker
Free online JWT expiry checker — check JWT token expiration status instantly in your browser. No data is stored. Reads exp, iat, and nbf claims, shows remaining lifetime or time since expiry in human-readable format.