Hash Generator
Last updated: May 11, 2026SHA-256, SHA-1 and SHA-512 hashes.
Hash Generator is a free online tool to sHA-256, SHA-1 and SHA-512 hashes. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Hash Generator
This free hash generator computes SHA-256, SHA-1 and SHA-512 digests of any text using the browser's built-in Web Crypto API. Paste your input and instantly get accurate hexadecimal hashes for checksums, integrity checks and fingerprinting. All hashing runs client-side, so the text you enter never leaves your device.
Read the full guide: Hash Generator Guide: SHA-256, SHA-1 and SHA-512 Hashes
- 1Paste or type the text you want to hash into the input field.
- 2Pick the algorithm you need, such as SHA-256, SHA-1 or SHA-512.
- 3Copy the resulting hexadecimal hash to use as a checksum or fingerprint.
Multiple algorithms
Generate SHA-256, SHA-1 and SHA-512 digests from the same input in one place.
Accurate and fast
Hashes are computed with the native Web Crypto API for correct, standards-compliant output.
Fully client-side
Your input is hashed in the browser, so sensitive text is never uploaded anywhere.
Compare a secret across two environments
When a config value or API key seems mismatched between staging and production, paste each into the SHA-256 field and compare the digests instead of the raw secrets. Identical hashes confirm the values match; differing ones flag a typo or stale variable. Because hashing runs client-side, the actual secret never leaves your browser or appears in a shared chat or ticket.
Generate known-answer hashes for unit tests
Writing tests for code that hashes input means asserting against a fixed, correct digest. Paste your exact test string here, pick SHA-256, SHA-1 or SHA-512, and copy the hexadecimal result straight into your assertion as the expected value. This gives you a trustworthy reference vector computed by the standards-compliant Web Crypto API, so a failing test points to your code rather than a bad expectation.
Create a fingerprint key for deduplication
To detect duplicate records or cache responses by content, you need a stable fingerprint of a string. Paste the canonical text, generate a SHA-256 digest, and use those 64 hex characters as a deduplication key or cache identifier. The same input always yields the same hash, so matching digests reliably signal identical content without storing or comparing the full original value.
Hash Generator — frequently asked questions
Can I reverse a hash back to the original text?
No. Cryptographic hash functions are one-way by design. You cannot recover the input from the hash, which is what makes them useful for integrity checks.
Should I use SHA-1 for security?
SHA-1 is considered weak against collision attacks and is fine only for non-security checksums. For security-sensitive work, prefer SHA-256 or SHA-512.
What is a checksum used for?
A checksum lets you verify that data has not changed. If a file or message produces the same hash on both ends, you can be confident it was not altered in transit.
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