SHA Hash Generator

SHA (Secure Hash Algorithm) is a family of cryptographic hash functions that convert any input into a fixed-length fingerprint — a hexadecimal string of a predictable size. SHA-256 produces 64 hex characters, SHA-384 produces 96, and SHA-512 produces 128. Hashing is a one-way operation: the same input always produces the same hash, but the original input cannot be recovered from the hash. Even a one-character change produces a completely different digest.

For integrity checks and fingerprints, SHA-256 is the best general-purpose choice — it is fast, hardware-accelerated, and universally supported. Use SHA-384 or SHA-512 when a longer digest is required (for example, matching a published checksum or satisfying a specific system's policy). All three are members of the SHA-2 family and remain collision-resistant; the older SHA-1 is not offered here because it has been deprecated for security use.

No. Encryption is reversible — with the key you can recover the original data. Hashing is one-way: there is no key and no way to reverse the digest. Hashes are used to verify integrity and to store passwords (typically with added salt and slow derivation, not plain SHA). If you need to protect data so it can be recovered later, use this site's AES text or file encryption tools instead.

Yes. All hashing runs in your browser using the Web Crypto API (crypto.subtle.digest). Your text never leaves your device, so this tool is safe for hashing passwords, secrets, or anything sensitive. It also works fully offline after the page loads.

No. Cryptographic hashes are designed to be computationally infeasible to reverse. An attacker can, however, guess inputs (like common passwords) and compare their hashes — that is what a "rainbow table" or dictionary attack is. That is why passwords should never be hashed with plain SHA alone, and why you should never use a raw SHA hash as a password.

When a site publishes a SHA-256 checksum for a download, generate the hash of the file you received (many OS tools can hash files) and compare it character-for-character. If they match, the file is bit-for-bit identical to the original. If they differ, the file was corrupted or tampered with during transfer.

Yes — completely free, no registration, and 100% private. Hashing runs locally in your browser using the Web Crypto API; nothing is sent to any server, and the tool works offline after the page loads.