Inspect PDF signature fields
Inspect PDF signature fields and whether values are present.
Local processing · Nothing is uploaded · 10 MB per file / 25 MB total
Input & settings
No files selected
Result
How to use
Choose the source file, review settings, process, then inspect and download the result.
Limits and behavior
Structural inspection only. It does not cryptographically validate a signature, certificate, trust chain or later document modifications. Local processing. Maximum 10 MB per file, 25 MB total and 100 PDF pages. Encrypted PDFs require the separate known-password decryption tool. Digitally signed input may lose signature validity after any modification; preserve your original. Unsupported or malformed files produce an error. Cancellation stops active PDF renders and discards stale results; a synchronous library step finishes before the browser can handle cancellation.
Identify signature fields in a PDF
Inspect whether a PDF contains signature fields and whether those fields contain values. This is useful for understanding document structure before review.
Does a present signature field prove that a signature is valid?
No. This tool does not establish cryptographic validity, signer identity or trust. Use a qualified PDF signature verifier for those checks.
Related tools: Inspect form fields · PDF permissions