Hash Generator (SHA)

Generate secure hashes instantly

A hash is a fixed-length fingerprint of your input — the same text always produces the same hash, but you can't work backwards to the original. This tool generates SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text using your browser's built-in Web Crypto, so nothing is ever uploaded.

Which one should I use?

• SHA-256 — the modern default for checksums, signatures, and integrity checks.
• SHA-384 / SHA-512 — longer digests for higher-security needs.
• SHA-1 — included for legacy compatibility, but it's cryptographically broken and shouldn't be used for security.

FAQ

Why is there no MD5?

The Web Crypto API deliberately omits MD5 and other obsolete algorithms because they're insecure. For any real integrity or security use, prefer SHA-256 or stronger. Hashing requires a secure (https) page.

Is this hash generator free, and does my text stay private?

Yes — it's free with no sign-up, and your input is hashed locally using your browser's built-in Web Crypto API. The text you enter is never uploaded or stored, so it's safe to hash sensitive data.

Will the same text always give the same hash?

Yes. Hashing is deterministic, so identical input always produces an identical digest for a given algorithm. Even a one-character change, however, produces a completely different hash — which is exactly what makes hashes useful for verifying that data hasn't been altered.

Can I reverse a hash back to the original text?

No. A cryptographic hash is a one-way fingerprint; there's no way to recover the original input from it. To check a value you re-hash the candidate text and compare the two digests.

How do I verify a file or download's checksum?

This tool hashes text rather than files. To verify a download, generate the file's hash with a tool that accepts files (or your operating system's command line), then compare it to the published checksum — they must match exactly, character for character.

Does it work on mobile?

Yes. It runs in any modern mobile browser that supports Web Crypto over https, so you can generate SHA hashes on a phone or tablet just as you would on desktop.