🔒 Pay once — your proof is permanent

One file. One proof. $9.

You're about to send that pitch deck. Without a timestamp, you have no proof it existed before the meeting. That's exactly what DocProof is for.

✅ No account required ✅ No subscription ever ✅ Certificate in ~30 seconds

Free — forever

$0

No credit card. No account.

✅ SHA-256 fingerprint any file
✅ Compare two files for tampering
✅ Verify any existing DocProof by ID
✗ Timestamped proof record
✗ Downloadable PDF certificate
✗ Shareable verification link

Use free tools →

Always free. No catch.

⭐ Most popular

One-time payment

$9

CAD / proof

Pay once. Proof is permanent. Forever.

✅ Everything in Free
✅ Cryptographic SHA-256 proof + UTC timestamp
✅ PDF certificate — downloadable, printable, archivable
✅ Public verification link — anyone can verify, no account
✅ Certificate emailed to you (optional)
✅ Permanent storage — no expiry unless you want one
✅ GDPR deletion at any time

Protect this file — $9 →

💳 Stripe • No subscription • No account needed

API / Developer

Custom

For teams that need volume.

✅ Everything in Proof
✅ REST API with API key auth
✅ Monthly proof quota (100+/month)
✅ Bulk proof creation via API
✅ Custom expiry policies
✅ Priority email support
✅ Usage dashboard

Starting at $29 / month • Read API docs

🔐 Your file is never stored — only the SHA-256 hash 🧾 PDF certificate ready in ~30 seconds 🌐 Anyone can verify your proof — no account needed 🗑️ Delete your data anytime (GDPR)

When do people actually use DocProof?

📤

Before pitching investors Prove your deck existed before the meeting

🤝

Before signing contracts Lock in the exact version both parties agreed to

💻

Before shipping code Snapshot your codebase before you go public

✍️

Before publishing Prove authorship of designs, writing, or research

Questions & answers

Do you store my file?

Never. Your file is hashed in memory the instant you upload it, then discarded completely. We only keep the SHA-256 fingerprint, filename, size, and UTC timestamp. It is mathematically impossible for us to reconstruct your file.

Is the $9 a subscription?

No. It's a one-time payment per proof. You pay $9, you get a permanent certificate. No renewals. No hidden fees. No account to manage. Ever.

What happens right after I pay?

In about 30 seconds you get: a unique Proof ID, your SHA-256 fingerprint, a public shareable verification link, and a downloadable PDF certificate. If you entered your email, the certificate is also sent there instantly.

Is this legally admissible?

A DocProof certificate is strong cryptographic evidence that a document existed at a specific moment. Hash-based timestamping is widely recognized. That said, legal weight depends on your jurisdiction — for high-stakes proceedings, consult a lawyer.

How is this better than emailing myself the file?

Email timestamps can be forged or disputed. A DocProof certificate is tamper-evident: any change to the file — even one character — produces a completely different SHA-256 hash, making forgery mathematically detectable.

What file types and sizes work?

Any file up to 25 MB: PDF, Word, Excel, ZIP, code, images, video. If it's a file, we can fingerprint it.

Can I delete my proof later?

Yes. Use the data deletion tool to permanently remove your proof and all metadata, any time, no questions asked.

Do I need an account?

No account, ever. Pay via Stripe, get your proof. Save your Proof ID. That's the whole flow. We built DocProof with zero-friction as a hard requirement.

Your work deserves proof.

No account. No subscription. Upload your file, pay $9, get a permanent cryptographic certificate in 30 seconds.

Create your first proof — $9 →

💳 Secured by Stripe • 🔒 File never stored • 🧾 PDF certificate in ~30s