Hash Generator Online — SHA-256, SHA-1, SHA-512 Free
Generate a SHA hash of any text, right in your browser. Your input is never uploaded.
Everything runs in your browser — your input is never uploaded.
How to generate a hash
- 1
Choose an algorithm
Pick SHA-256 (the common default), SHA-1, SHA-384 or SHA-512.
- 2
Type or paste text
Enter the text to hash. The hex digest updates as you type.
- 3
Copy the digest
Copy the resulting hash or download it as a text file.
Why use this tool
Files never leave your device
Everything runs inside your browser. Nothing is uploaded, stored or seen by anyone but you.
No signup, no watermark
No account, no email, no branding stamped on your output. Free with no daily limit.
Instant — no upload wait
Because there is no round trip to a server, results appear as fast as your device can work.
Works on your phone
Built mobile-first, so you can do this from a phone browser without installing anything.
What a hash is good for
A hash turns any input into a fixed-length fingerprint. The same input always yields the same digest, and any change flips it completely, which makes hashes ideal for verifying that a file or message hasn't changed. They are one-way, so they identify data without revealing it.
Frequently asked questions
- Is my input uploaded?
- No. Hashes are computed in your browser with the Web Crypto API, so your text never leaves your device.
- Which algorithm should I use?
- Use SHA-256 unless a system specifically requires another. SHA-1 is legacy and considered weak for security; SHA-384 and SHA-512 produce longer digests.
- Can I reverse a hash back to the text?
- No. Cryptographic hashes are one-way by design — you cannot recover the input from the digest. That is what makes them useful for integrity checks.
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