Establish proof,
and check it.

Calculate a fingerprint, verify a certificate, record what is online: everything you need to produce and check digital proof, free of charge and without an account. Everything that can be calculated in your browser is: nothing is transmitted, not even to us.

Scealia mobile app

Create a timestamp or a Constat Scealia in seconds, from your phone: photo, video or audio recording, certified at the moment of capture.

Sign up

Certificate verifier

Check the authenticity of a timestamp or a Constat Scealia: by QR code, technical proof file or number. No account needed.

Open the tool

Digital fingerprint

Calculate the SHA-256 fingerprint (hash) of a file or text, and compare two items with each other.

Open the tool

Web capture

Record the content of a website, a social network or a listing as it stood on a given date.

Coming soon

Electronic seal

Apply a qualified eIDAS seal to a document or a fingerprint, enforceable in the European Union.

Coming soon

Blockchain timestamp

Seal a document's fingerprint on a public blockchain, giving it a certified date, enforceable against third parties.

Coming soon

AI-generated content detection

Detect whether content was created or modified by an AI model.

Coming soon

Scealia plug-in

Enable Scealia timestamps and electronic seals in your programming interface and modules.

Coming soon

Scealia API

Integrate timestamps and Constat Scealia into various third-party solutions, through a programming interface.

Coming soon

Scealia MCP

Connect various artificial intelligence tools to Scealia, to use timestamps and Constat Scealia.

Coming soon

These tools work on a file that already exists, and therefore on its state at the moment you hand it to them. The Scealia app certifies the integrity of a photo, a video or a recording at the moment of capture, which no later processing can make up for. Understand the certificate · Verify an existing certificate