Hash Generator (SHA-256, SHA-1, SHA-512) — Free
Generate SHA-256, SHA-1, SHA-384, and SHA-512 hashes. 100% in your browser — free, no sign-up.
- ✓Free
- ✓No sign-up
- ✓Runs in your browser — files never uploaded
- ✓No watermark
How to
- 1Type or paste your text — it is hashed in your browser and never uploaded.
- 2Choose an algorithm (SHA-256 is a good default).
- 3Copy the resulting hash.
What is a hash?
A cryptographic hash turns any input into a fixed-length string of characters that is practically impossible to reverse. The same input always produces the same hash, and even a tiny change to the input produces a completely different one — which makes hashes ideal for fingerprinting and integrity checks.
How hashing works here
Hashes are computed with the browser's built-in Web Crypto API, entirely on your device — your input never leaves the page. You can generate SHA-256, SHA-1, SHA-384, and SHA-512 from the same text and copy whichever you need.
When to use it
Verify a downloaded file matches a published checksum, generate a fingerprint of some data, compare two inputs without storing them, or produce a hash for a quick integrity check. Developers use hashes constantly for caching keys and data verification.
Which algorithm should I use?
Prefer SHA-256 or SHA-512 for new work — they are the current standards. SHA-1 is included for compatibility with older systems but is considered weak and should not be used for security. Note that none of these are meant for hashing passwords; that needs a slow, salted algorithm like bcrypt or Argon2.
FAQ
Is my input uploaded?+
No. Hashes are computed with the browser's Web Crypto API on your device — your input never leaves the page.
Which algorithm should I use?+
Prefer SHA-256 or SHA-512 for new work. SHA-1 is included for legacy compatibility but is considered weak for security.
Can I use this to hash passwords?+
No. These are fast general-purpose hashes. Passwords need a slow, salted algorithm like bcrypt or Argon2.
Can I verify a file checksum?+
Yes. Hash the same content and compare it to a published checksum to confirm a download was not altered.
Is it free?+
Yes, completely free — no sign-up and no watermark.
Is my data private?+
Yes — this tool runs entirely in your browser. Your files and text are never uploaded.