Crypto
7 tools · all client-side
- BIP-39 Mnemonic & Entropy InspectorInspect, validate, and convert BIP-39 mnemonic phrases (12/15/18/21/24 words) and raw hex entropy with bit-level checksum verification.
- Hash GeneratorSHA-1, SHA-256, SHA-384 and SHA-512 checksums. Computed by your browser, never sent anywhere.
- HMAC GeneratorCompute Hash-based Message Authentication Codes (HMAC) using SHA-256, SHA-384, SHA-512, or SHA-1 via Web Crypto.
- JWT DecoderDecode JSON Web Tokens (JWT) to inspect header and payload claims. Formats standard timestamps (iat, exp, nbf) and checks expiration.
- JWT Sign & GeneratorGenerate and cryptographically sign JSON Web Tokens (JWT) using HMAC (HS256, HS384, HS512) via Web Crypto API.
- Password & Secret Token GeneratorGenerate cryptographically secure passwords, API tokens, and passphrases. Includes entropy score, character sets, and ambiguous character filtering.
- Random String GeneratorCryptographically secure random string and token generator with customizable characters and format.