🔎 Free tool • Compare files • No upload stored

Compare two files (SHA-256)

Upload two files to compute their SHA-256 hashes and confirm if they are bit-for-bit identical. Your files are never stored.

Use cases: “same contract version?”, “same PDF sent?”, “download identical to original?”, “tampered file?”.

Compare two files

Both files are processed in memory and immediately discarded.

How file comparison works

We compute the SHA-256 hash of each uploaded file. If hashes match, files are identical. Any change (even 1 byte) produces a completely different hash.

What’s next?

Verifying a hash tells you if a file is intact — but it doesn’t prove when it existed.

  • ✔️ Generate a permanent proof ID
  • ✔️ Get a timestamped PDF certificate
  • ✔️ Share a public verification link
  • ✔️ No account • No file storage

Creating a timestamped proof (Proof ID + PDF certificate) is a paid feature.

Create a timestamped proof