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Tools · File checksum

File checksum

Compute a file's hash (SHA-256, SHA-1, SHA-512) to check its integrity. Everything happens in your browser.

Drop a file here
Choose a file
Any file type

Processed on your device. Your files never leave it.

Verify that a file has not been altered by computing its cryptographic hash, no software needed. Everything happens in your browser.

  • 100% client-side computation: no file is uploaded.
  • SHA-256, SHA-1 and SHA-512, one-click copy.
  • Free, no sign-up, no watermark.

See also

Protect a PDF
Encrypt with a password.
Unlock a PDF
Remove the password.
Redact a PDF
Permanently black out areas.
Blur an area
Hide a face, a plate, a name.

Frequently asked questions

How do I compute the checksum of a file?
Upload your file, the tool computes its fingerprint, for example in SHA, and displays it. You can copy it to compare it or keep it.
What is the point of verifying a file's fingerprint?
Comparing the SHA fingerprint confirms that a file has not been altered or corrupted during a download. If the two fingerprints match, the file is intact.
Is my file sent to a server for the computation?
No, the fingerprint is computed entirely in your browser. Your file never leaves your device and is not uploaded.
Is the tool free and sign-up free?
Yes, computing a checksum is free, with no ads and no account. You verify the integrity of your files freely.