Certify documents on the blockchain for free
Free, anonymous, distributed, and secure proof of existence for any digital document.
Drop your document here, or click to select it from your computer.
Max. 1MB
How does it work?
Free Blockchain Proof is like a free anonymous notary, where you can create a proof of the existance of a document or text.
Submit your Document
The original document will be included in the generated PDF certificate.
Blockchain timestamping
A proof of the existence of your document will be written into the Litecoin blockchain.
Proof authenticity
You will recieve your PDF certificate via email, which you can later validate at any time.
Frequently asked questions
What data do you store?
We only store the email address, and sha256 digests of the uploaded data and the mailed PDF. We do not store the documents or certificates themselves after they have been mailed out.
How are you able to do this for free?
Two things enable us to provide this as a free service; 1), the very low price of Litecoin transactions means that they do not generate significant cost, and 2), many document proofs can be batched into a single transaction, so the number of transactions remains constant rather than increasing with each request.
How long does it take?
After submitting, you will recieve your PDF certificate in about 15 minutes.