Free Online Security, Hash & ID Generator Tools

Generate an HTTP Basic Authorization header from a username and password, or decode a header locally.

Generate salted bcrypt hashes or verify a password against an existing bcrypt hash locally, with UTF-8 length and cost validation.

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text in a single click.

Generate HMAC signatures with SHA-256, SHA-384, SHA-512, SHA-1. Hex and Base64 output.

Decode JSON Web Tokens and inspect header, payload, and signature with formatted timestamps.

Decode JWT claims locally and show the exp time and time remaining without verifying the signature.

Sign JSON Web Tokens with HS256, HS384, or HS512 using the Web Crypto API.

Create strong, cryptographically secure passwords with configurable length and character classes.

Check password length, character variety and estimated guessing difficulty locally. The password is never sent to a server.

Generate SHA-256, SHA-384 and SHA-512 Subresource Integrity values from exact file bytes or UTF-8 text.

Calculate SHA-256 and legacy MD5 fingerprints from an OpenSSH public key and inspect its wire-format fields.

Generate time-sortable 26-character ULIDs — 48-bit timestamp + 80 random bits in Crockford Base32.

Generate v4 (random), v7 (time-ordered), and nil UUIDs — up to 1000 at a time with CSPRNG.

Validate UUID syntax and inspect its version, variant and UUIDv7 timestamp without generating new identifiers.

Inspect a public PEM certificate’s subject, issuer, validity dates, fingerprints and public key without performing trust validation.