SHA-256 Generator
Compute collision-resistant SHA-256 digests for checksums, content IDs, and integrity verification.
Generate SHA-256 hashes instantly with WebCrypto. Free online SHA-256 generator for checksums, Git-style IDs and integrity checks.
Calculator Inputs
About SHA-256 Hash
Compute collision-resistant SHA-256 digests for checksums, content IDs, and integrity verification.
SHA-256 maps any input to a fixed 64-character fingerprint using your browser’s native WebCrypto engine — the same vetted implementation behind TLS. Flip one input bit and roughly half the output bits change.
Unlike MD5, SHA-256 has no practical collisions: safe for integrity checks and identifiers. Never hash passwords directly (use Argon2/bcrypt); hashes of weak inputs fall to dictionaries. Everything runs locally.
Where it is used
Verifying downloads, Git-style content addressing, cache keys, and API signature debugging.
How to use the SHA-256 Hash
- Text To Hash — enter the value (e.g. hello).
- Output Case — enter the value.
- Calculate — press the Calculate button to see the result instantly above.
Formula
NIST FIPS 180-4 via WebCrypto SubtleCrypto.digest (native, constant-time-ish).
Examples
Example
Frequently Asked Questions
- SHA-256 vs MD5 — which for checksums?
- SHA-256. MD5 collisions are practical to forge; SHA-256 has none. Both detect accidental corruption equally well.
- Why does it need HTTPS?
- Browsers gate SubtleCrypto behind secure contexts. On plain HTTP the tool explains this instead of failing silently.
- Can I hash files too?
- This tool hashes text. For files, use a checksum utility (sha256sum, CertUtil) or drag-and-drop file hashers.