SaveProof helps you keep a verifiable record that a note and files existed in a specific form no later than the recorded time. Create a Proof, save the resulting file, and share it when needed.
Write or paste a note: an agreement, a description of your work, a letter, or other text you want to record. Attach files if needed.
You can use a note, files, or both. Before creating a Proof, check the text, the included files, and their order.
Your note and files are processed on your device. SaveProof does not receive their contents.
Open does not mean publishing your files on the website. You save and share the result yourself.
You may add a Proof name. It is public on the Verification Page and cannot be changed after creation. Do not include information you want to keep private.
For a Protected Certificate, choose when the contents can be opened.
A new access request needs a connection to SaveProof. Meeting the conditions does not send the contents automatically: the recipient needs the file and the passphrase, if one was set.
Review the content and settings, then create the Proof. Keep the resulting PDF or .saveproof file somewhere safe. It includes the Certificate and your content, readable or encrypted according to your choice.
Make sure the file has been saved on your device. SaveProof does not keep a copy of your note and files.
Check the registration messages. Saving a file alone does not confirm registration. If the service offers a registration retry, keep the file and complete that action before closing the page.
Choose the saved file on Verify to check the Proof and its available content.
Send the saved file to the recipient in your preferred way. If you added a passphrase, share it separately.
The recipient chooses the file on Verify. Protected content opens when the access conditions are met, a delivery is available, and the passphrase is entered if required. Reopening with authorization already received does not use a new delivery.
The Verification Page link lets you check the public Proof record. The saved file is needed to obtain the content itself.
Choose a situation to see suitable settings and what to do with the resulting file.
You wrote down an agreement
You and someone else agreed on something and wrote it down — a shared plan, a responsibility, a price, or a promise to do something.
Add the final document to SaveProof and create a Proof. Save and share the resulting PDF or .saveproof file: it includes the Certificate and readable original. Later, either of you can choose it on Verify to check the content against the registered Proof.
The browser creates a fingerprint of your note and files. For a Protected Certificate, it also encrypts the contents on your device. SaveProof never receives the note, original files, or Encryption Passphrase.
The service receives the fingerprint and approved metadata, records the time, and signs the Proof. Its Verification ID opens a public Verification Page. An optional Proof name is public there. For a Protected Certificate, SaveProof also stores the access conditions and the key component needed to enforce them, but not the content-bearing file.
The Certificate and contents are assembled into a PDF or .saveproof package on your device. You save the file and share it yourself. A public link does not replace that file or disclose its contents.
The browser checks the Proof signature. Available content is checked separately: its fingerprint must match the recorded one. Protected content can be checked after authorized opening and decryption. Public Proof verification is possible before disclosure; a new access request needs a connection to SaveProof. A date or owner permission does not show that a recipient opened or read the contents.
Save the HTML reader with your PDF or .saveproof package to check it without an internet connection. Files and notes stay on your device.
For Protected Packages, the reader checks public Proof data offline. Opening protected content requires a previously authorized SaveProof response; saving that response is not yet available in the website interface.
A Proof records content and time. It does not prove authorship, ownership, truthfulness, identity, or legal validity.