🔒 Privacy-first • No account • File never stored

Prove your work existed
before you shared it.

Before you send a pitch deck, contract, or code snapshot — generate a cryptographic timestamp proving it existed at a precise moment. No account. No file storage. $9 one-time.

Protect this file — $9 How it works
👁 Preview the official certificate → (sample)
🗓️ Verifiable UTC timestamp 🧾 PDF certificate (instant download) 🔗 Shareable public verification link 🧠 SHA-256 cryptographic fingerprint
Used by founders, freelancers, lawyers, and developers who ship fast and need to prove it.

Create your proof

$9 one-time
🔒 Your file is hashed in memory and immediately discarded — we never see its contents.
One-time payment · Permanent proof · No subscription · No account
You get instantly:
  • Unique Proof ID you can reference forever
  • SHA-256 fingerprint of the exact file bytes
  • Public verification page — shareable, no login
  • Downloadable PDF certificate to archive

See the certificate before you pay

Every proof includes a printable PDF certificate with your unique Proof ID, SHA-256 fingerprint, UTC timestamp, and a public verification link.

Create a proof — $9 Preview certificate →
One-time payment · Instant PDF · No account required
This is a sample preview. Your certificate will include your file's fingerprint, timestamp, and Proof ID.

Why people use DocProof

📤
Before pitching investors
Prove your deck or roadmap existed before the meeting
💻
Before hiring developers
Prove what version of your idea or code existed
🤝
Before signing partnerships
Timestamp the exact agreement version both parties saw
✍️
Before publishing
Secure authorship of original designs, writing, or art
Step 1

Select your file

Choose any file up to 25 MB (PDF, image, doc, ZIP, code). We fingerprint the exact bytes in memory.

Step 2

Get your timestamp

After the one-time $9 payment, we create a cryptographic proof with a UTC timestamp. PDF certificate ready in seconds.

Step 3

Verify anytime

Share the link. Anyone can verify by re-uploading the original file — the SHA-256 hashes must match. No account needed.

🔐
Privacy by design: DocProof never stores your file. Only the cryptographic fingerprint and timestamp required for verification are kept. Even if our servers were breached, nobody could reconstruct your document from a SHA-256 hash.
Read our Privacy Policy →

Don't send it without proof.

$9, no account, 30 seconds. Your file stays private — only its cryptographic fingerprint is stored.

Create a proof now →

View pricing  •  API for developers  •  Verify an existing proof