Drop the PDF here. In one second you see where it comes from and whether it has been modified. Free, in two clicks.
The PDF is read in your browser. The file stays on your device.
The document's seal is checked against the one the issuer added, in milliseconds.
Authentic, modified, or not certified. With a public ID, anyone can check it again.
The verdict shows the moment of issuance and every change since. The document's content stays private.