Crypto
Hash files, compute HMAC signatures, inspect JWTs, and encrypt with AES-GCM using the Web Crypto API. Digests, tokens, and passwords stay in the browser so you can debug auth and checksums without a hosted crypto service.
Hash Generator
Generate cryptographic hashes (SHA-256, SHA-1, MD5, and more) from text using Web Crypto in your browser. Create checksums for files-as-text, compare digests, and copy hex output. Hashing never leaves the tab, so test strings and secrets stay private.
HMAC Generator
Compute HMAC-SHA signatures in the browser for webhook secrets and API signing. Paste a message and a key, pick SHA-1 through SHA-512, and copy hex or Base64. Keys stay in the tab.
JWT Decoder
Decode JSON Web Tokens locally to inspect the header, payload, and expiry claims. Paste a JWT and read Base64URL-encoded fields without verifying signatures on a remote service. Ideal for debugging auth flows while keeping tokens off the network.
JWT Encoder
Sign a JSON object into a compact HS256, HS384, or HS512 JSON Web Token in the browser. The HMAC secret stays in the tab, so you can mint a test token without posting it to a hosted encoder.
AES Encrypt
Encrypt and decrypt text with AES-256-GCM in the browser. A password is stretched with PBKDF2; output is Base64(salt + IV + ciphertext). Useful for sharing a short secret over a side channel you control. Keys never leave the tab.
TOTP Generator
Compute a time-based one-time password from a Base32 secret with HMAC-SHA, the same algorithm authenticator apps use (RFC 6238). Pick SHA-1, SHA-256, or SHA-512, 6 or 8 digits, and a 30- or 60-second step. The secret stays in the tab.
Secret Redactor
Redact JWTs, AWS keys, GitHub tokens, private keys, bearer tokens, and emails in pasted logs. Replacement happens in the tab.