Verify PDF Signature

How to use Verify PDF Signature

1. Open Verify PDF Signature — no sign-up or software download is required.
2. Drag and drop your file(s) into the tool, or click to browse and select them from your device.
3. Choose any options you need, such as order, quality, page range or output format.
4. Click the action button and let the tool process everything locally in your browser.
5. Download the finished file. Your originals are never changed or uploaded.

Why use Verify PDF Signature?

• 100% free with no limits, no sign-up and no watermarks.
• Private by design — your files are processed in your browser and never uploaded to a server.
• Fast and lightweight, with instant results even on a phone or a slow connection.
• Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
• Part of a full pdf tools suite, so related verify pdf signature tasks are one click away.

What people use Verify PDF Signature for

• Checking a received document against a fingerprint the sender provided.
• Confirming a file has not been altered since it was archived.
• Detecting whether a PDF carries an embedded digital signature.

Verify PDF Signature: limits and things worth knowing

• A matching fingerprint means the file is byte-identical to the one that was hashed. A mismatch means something changed — which can be tampering, or simply a re-save by a PDF reader that rewrote the file structure.
• The tool also reports whether the PDF contains embedded signature objects, which is separate from the fingerprint check.
• Detecting a signature is not the same as validating its certificate chain. Full validation against a trust store needs Acrobat or a dedicated signature service.

Is it private and secure?

Your privacy is built in. Verify PDF Signature does all processing on your own device using client-side code, so your files are never transmitted, stored or seen by anyone — including us.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

We also measured the competition. Our PDF upload audit recorded how many bytes each of 20 online PDF tools actually transmits: 12 of the 13 measurable services uploaded the whole test file, and Filevane transmitted 0.00 MB.

Learn more

How to Sign a PDF Electronically for Free — Add your signature to a PDF by drawing, typing or uploading it — no printer, no scanner. A quick guide to e-signing safely.