No file analyzed yet

Select a PDF to see whether it contains digital signatures.

Tip: any signed PDF works, for example a document signed with Adobe Acrobat or a browser PDF signature tool.

When to use PDF Signature Checker

Common situations where this tool helps:

Verify a signed contract
Before archiving a contract, confirm that the PDF actually contains a digital signature field.
Check invoice authenticity
See at a glance whether an e-invoice carries a digital signature before processing it.
Troubleshoot signature workflows
When a signing tool reports an error, inspect the raw signature tokens to find what is missing.
Audit document pipelines
Spot-check files produced by automated pipelines to make sure signatures are embedded correctly.
Quick privacy-first checks
Inspect sensitive documents without uploading them to any online service.

How do I check a PDF for digital signatures?: Drop the PDF into the drop zone or click it to choose a file. The tool scans the file locally and shows a status badge plus one card per detected signature.
Is my file uploaded to a server?: No. The file is read directly in your browser and never leaves your device.
Does this tool verify that a signature is valid?: No. It performs structural detection only: it finds signature dictionaries in the PDF and reports fields such as SubFilter, signing date, and byte range. Cryptographic verification requires a dedicated tool.
Why does a signed PDF show no signatures?: Some documents use image-based or scanned signatures, which are not digital signatures. The tool only detects real PDF signature fields.
Can I use this tool on a phone?: Yes. The tool works in mobile browsers and runs entirely on your device.