Hash Generator

A hash function turns arbitrary data into a fixed-length digest that's unique to that content — changing even one letter of the input completely changes the output. This tool computes a hash of text or a file using 13 popular algorithms at once, right in your browser.

Which algorithm to pick

• MD5 and SHA-1 — cryptographically broken (practical collision attacks exist) but still used for file-integrity checks where an attack is unlikely.
• SHA-256 / SHA-512 (the SHA-2 family) — the standard for signatures, certificates, and blockchains; no known practical attacks as of 2026.
• SHA3 and BLAKE2/BLAKE3 — newer designs; BLAKE3 in particular is very fast and parallelizes well on large files.
• CRC32 / Adler-32 — not cryptographic, meant only for detecting accidental corruption (e.g. in ZIP files), not for defending against deliberate tampering.

Common uses

• Verifying that a downloaded file isn't corrupted or tampered with, by comparing its hash to the one published by the developer.
• Generating a content-based cache key or identifier.
• Quickly comparing two large files or texts without a byte-by-byte diff.

Things to keep in mind

Hashing isn't encryption — it's one-way, so you can't recover the original data from a hash.

Plain fast hashes (MD5, SHA-256) are unsuitable for passwords — use a dedicated slow algorithm like bcrypt, Argon2, or PBKDF2 instead.