Hash Generator
Generate SHA-256, SHA-1 or SHA-512 hashes from any text, computed locally in your browser.
How to use the Hash Generator
- Paste the text you want to hash.
- Choose SHA-256, SHA-1 or SHA-512.
- Copy the resulting hex digest.
About the Hash Generator
A cryptographic hash is a one-way fingerprint: the same input always gives the same output, and there is no way to reverse it. That makes hashes useful for verifying that a file or message has not changed. SHA-1 is included for compatibility with older systems but is considered broken for security purposes — use SHA-256 or SHA-512 for anything new. Hashing alone is not sufficient for storing passwords, which need a slow algorithm with a salt.
Frequently asked questions
Can a hash be reversed?
No. Hashing is one-way; the only way to find an input is to guess and test candidates.
Is SHA-1 still safe?
Not for security. Practical collision attacks exist — use SHA-256 or SHA-512 instead.
Is my text sent to a server?
No. Hashes are computed with the browser's built-in Web Crypto API and nothing leaves your device.
Can a hash be reversed back into the original text?
No. Hashing is deliberately one-way, so there is no 'decrypt' operation. Short or common inputs can still be discovered by guessing and comparing hashes, which is exactly why stored passwords need a salt and a slow algorithm rather than a plain SHA hash.
Can I generate an MD5 hash here?
No, and deliberately so. This tool uses the browser's built-in Web Crypto API, which does not implement MD5 at all — the algorithm has been considered broken since practical collisions were demonstrated in 2004, so browsers never shipped it. If you need a checksum to verify a download, use the SHA-256 option, which is the algorithm most projects publish their checksums in today.
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Runs entirely in your browser — nothing you enter is uploaded. Last reviewed and updated .