Security & encoding tools
Decode JWTs, encode Base64 and generate credentials locally. Nothing is transmitted or logged.
JWT DecoderDecode a JWT's header and payload, check expiry, and verify HS256/384/512 signatures — entirely client-side, and decoding is never confused with verifying.Base64 Encoder & DecoderEncode and decode Base64 and Base64URL with full Unicode support, plus file-to-data-URI conversion for images. Runs offline — nothing is ever uploaded.Hash GeneratorGenerate SHA-1, SHA-256, SHA-384, SHA-512 and HMAC digests of text or a file, in hex or Base64 — computed locally with WebCrypto.Password GeneratorGenerate strong random passwords and passphrases with a computed entropy readout — unbiased, cryptographically random, never transmitted.JWT GeneratorSign a JWT with HS256, HS384 or HS512 and custom claims, generate a strong signing secret, and see which claims a validator will object to.SSL Certificate DecoderDecode a PEM X.509 SSL certificate to read its subject, issuer, SANs, key size and expiry date — parsed in your browser, never uploaded.