Check a signed PDF
See whether a PDF is the exact file someone signed through BoltPDF, with nothing changed since. The file stays on your device: only its fingerprint (SHA-256) is sent to check it.
Drop the signed PDF here, or choose it
It's checked in your browser and never uploaded.
A file is checked by its fingerprint, which changes when anything in the file changes, even saving it again in another app. Signed PDFs from BoltPDF end with a certificate page that lists who signed, how they were identified and when.