Hash Generator (SHA-256, SHA-1)
Type or paste text to compute its cryptographic hash. The tool uses the browser's built-in Web Crypto, so your input never leaves the page.
What this tool does
- SHA-256, SHA-1, and SHA-512 computed at once
- Uses the browser's audited Web Crypto (SubtleCrypto) implementation
- Hashes update live as you type
- Fully local — safe for passwords and tokens you want to fingerprint
Also known as: sha256 generator, checksum tool, sha1 hash.
Frequently asked questions
Why is MD5 not offered?
The browser's built-in crypto (SubtleCrypto) doesn't include MD5, and MD5 is cryptographically broken anyway. SHA-256 is the modern default for checksums and fingerprints, so it's the one to use.
Can a hash be reversed?
No. A cryptographic hash is one-way — you can't recover the original text from it. Identical input always gives identical output, which is what makes hashes useful for verifying integrity.
Is my input private?
Yes. Everything runs in your browser with JavaScript — nothing you type or paste is uploaded, logged, or sent to a server. You can disconnect from the internet after the page loads and it still works.