Documonk. Documents on the blockchain.
Every document you issue is tamper-proof, instantly verifiable, and backed by an immutable on-chain record.
Trusted by the best Organisations & brands worldwide
Our goal is simple — make every certificate, credential, and record you issue permanently verifiable, without exposing a single byte of personal data.
Whether you're a university, a hospital, or a financial institution, we give your documents the one thing paper never could: proof that cannot be faked.
Download a sample
Grab a sample Documonk-issued document to test the verification yourself.
Drag & Drop
Drop the document into the verifier on the right.
See the result
We check the document's hash against its blockchain record and confirms whether it's authentic. Any alteration — even a single pixel — produces a different hash and triggers a failed verification.
Document issuance, done right
Documonk is built for organisations that can't afford to have their documents questioned. Our platform handles the entire issuance chain — from hash generation to on-chain recording — without requiring any blockchain expertise from your team.
Decentralised on Ethereum & Polygon, tamper-proof and fail-safe, GDPR compliant by design, verified in under 0.2 seconds. Every part of the system is engineered to be invisible to your end users and effortless for your team. No infrastructure to maintain, no compliance headaches — just issue and let the chain do the rest.
For developers, Documonk is API-first and integrates in under 10 lines of code — drop it into your existing CRM or ERP without rebuilding your stack. Custom integrations and dedicated enterprise support are available for organisations with specific requirements. Wherever authenticity matters — universities, hospitals, banks, governments — Documonk gives your documents permanent, provable integrity at a fraction of the cost of legacy solutions.
Pay only for what you use.
Perfect for startups
- 1 users
- Single API
- Multi Role
- Chat Support
- Account Manager
Perfect for company
- 2 users
- 5 API's
- Multi Role
- Chat Support
- Account Manager
Perfect for business
- 20 users
- 100 API's
- Multi Role
- Chat Support
- Account Manager
Generates PDF’s
Documents are created as PDFs by the issuing organisation — a university, hospital, bank, or any institution. No changes to your existing document workflow are required.
Computes a unique hash
Documonk generates a cryptographic fingerprint of the document. This hash is mathematically unique to that exact file — changing even a single character produces an entirely different result.
Derive a unique key
A unique key is derived from the hash and registered against your issuer identity. This is the record that will live permanently on the blockchain.
Stage on the blockchain
The key is validated against all existing records to eliminate duplicates before being committed. Nothing is written to the chain until integrity is confirmed.
Record on-chain
The key and its associated metadata are permanently written to Ethereum or Polygon. From this point, the record is immutable — no one, including Documonk, can alter it.
Verify anywhere
Anyone holding the document can verify it instantly using Documonk's verifier or API. A matching hash confirms authenticity. A mismatch means the document has been altered.