Signature Field Detector
Scan a PDF and list its AcroForm signature fields. Pro feature.
Upload a PDF to list the AcroForm signature fields it contains, plus their page number and box dimensions.
| # | Field name | Page | Box (pt) | Required |
|---|
How to use Signature Field Detector
- Upload a PDF you suspect has fillable signature fields.
- The tool lists every AcroForm signature field it finds, along with its page number and box dimensions.
- Use this to confirm a document is ready for e-signing before sending it out, or to debug why a signing tool isn't finding expected fields.
About this tool
Signature Field Detector is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: PDF & Document Tools. Browse more PDF & Document Tools tools.