Verify a proof seal
Check that a file is byte-for-byte unchanged since ProofSave sealed it. Everything runs in your browser — the file is never uploaded and we never see it.
Don't have the seal file? Ask the seller for the document and its seal — on their ProofSave record it's the “Seal ⤓” download next to the file.
What this proves — and what it doesn't
✓ The file is unchanged since ProofSave sealed it on the date shown — down to the last byte.
✗ It does not prove the original document was genuine when it was first saved. ProofSave seals what a person stored, and when — that's all.
No account needed. No file upload. The public keys live at https://proofsave.com/.well-known/proofsave-seal-keys.json.
Want your own sealed proofs?
Save a receipt once and it's sealed forever — free for your first 3.
Start free — first 3 proofs