Compute a SHA-256 checksum for a file to verify downloads or detect silent corruption. Hashing runs in the browser so the file never leaves your machine for a checksum website.
Tools
Private by design. Heavy tools (OCR) may take a minute on large files.
How it works
Checksums are calculated on-device. We do not upload the file to hash it.
1
Choose file
Pick the binary you want to verify.
2
Hash
SubtleCrypto / local hashing produces the digest.
3
Compare
Match against the publisher’s published checksum.
When you’d use this
Verify a Linux ISO or driver package after download, or confirm two copies of a statement PDF are identical.
FAQ
About file hash checksum online
MD5?
This tool focuses on modern SHA-256. Prefer SHA-256 over MD5 for integrity checks.
Text hashing?
Hash the saved file, or paste into a text file first.
Private?
Yes — local only.
Related tools
More private utilities that pair well with this page.