Proofisy
Integrity Check & Proof of existence
Prove your files exist.
Verify they remain unchanged.
Proofisy helps you build trust in your digital files by generating verifiable integrity certificates directly in your browser — with the option to register their digital fingerprint on Casper Network using the DePEx feature.
Each certificate contains a unique SHA-256 digital fingerprint specific to your file, making it possible to verify its integrity and determine whether it has been modified.
At any time, you can compare a file against its certificate to confirm that it remains exactly unchanged — whether minutes, months, or years later.
No uploads. No cloud processing. Your files stay on your device.
Privacy First
All fingerprint generation and verification are performed locally in your browser.
Instant Verification
Verify the integrity of documents, images, archives and videos in just a few seconds.
Any File Type
ZIP archives, PDFs, photos, videos, contracts or any other digital files.
New Proofisy feature
DePEx — Decentralized Proof of Existence
Prove that your file existed at a specific point in time.
With the DePEx feature, Proofisy can register your file's SHA-256 digital fingerprint on Casper Network
.
Your original file never leaves your device — only its digital fingerprint is registered on the blockchain.
🔒 Your file stays private
Only its SHA-256 fingerprint is registered.
⛓️ Blockchain proof
Your proof is anchored on
Casper Network.
📜 Enriched certificate
Blockchain proof details are included in your Proofisy certificate.
DePEx is built directly into Proofisy. Simply switch DePEx ON before selecting your file.
Ready to build trust in your files?
Start generating integrity certificates for your files directly in your browser.
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