Proofisy
Integrity Check
Verify that your files remain unchanged.
✅ Privacy first
Your files never leave your device. All hashing and verification are performed locally in your browser.
Proofisy does not analyze your files. Only anonymous usage statistics are collected to improve the application experience.
New to Proofisy?
Start the First Experience and learn the complete workflow in 3 minutes.
🔨 Generate fingerprint & certificate
💡 Recommended workflow
For maximum integrity preservation and long-term verification, Proofisy recommends using ZIP archives containing your original files.
Free version limitations
- Up to 10 certificates per month
- Maximum file size: 5 MB
- Archive files (ZIP, RAR, 7Z...) require Proofisy PRO
Free plan usage
10 certificates remaining this month
Optional certificate information
Drop original file here
or choose a file manually
Any file type: image, text, audio, video...
(Archive files (ZIP, RAR, 7Z...) available in PRO mode)
🔍 Verify Integrity
✅ Integrity verification is free forever
Anyone can verify a Proofisy certificate at any time — even without a subscription. Certificate verification and certificate viewing will remain freely accessible to everyone.
Proofisy certificate
Drop certificate here
Only Proofisy JSON certificates are accepted
Original file
Drop original file here
Any file type: archive, image, text, audio, video...