A cryptographic hash is a fixed-size fingerprint of data produced by a hash function. The same input always produces the same hash, but you can't reverse a hash back to the original input.

Which hash should I use?

SHA-256 is the standard choice for most uses — checksums, data integrity, digital signatures. SHA-512 is stronger but outputs a longer string. SHA-1 is outdated and should not be used for security-critical purposes.

Can I hash a password with this tool?

For storing passwords, use a dedicated password hashing function like bcrypt or Argon2 — not SHA-256. General-purpose hash functions are too fast, making them vulnerable to brute-force attacks against passwords.

Is my text sent to a server?

No. Hashing runs entirely in your browser using the Web Crypto API.

Hash Generator

Generate SHA-256, SHA-1 and SHA-512 cryptographic hashes from any text. Free, instant, private.

Frequently asked questions

Hash Generator — SHA-256, SHA-1, SHA-512 Online Free

Generate cryptographic hashes from any text string. Useful for verifying file integrity, creating checksums, testing hash functions, and general-purpose data fingerprinting. Supports SHA-1, SHA-256, and SHA-512 via the browser's built-in Web Crypto API.

Three algorithms

SHA-1, SHA-256, and SHA-512 — the most widely used hash algorithms — all shown at once.

Web Crypto API

Uses the browser's native crypto implementation. Fast, accurate, and private.

No server

Your text never leaves your device.

Verifying a download checksum? Testing a hash implementation? Need a deterministic fingerprint of a string? Generate it instantly.