Inspect exact field names
Use Fill PDF Forms and choose Inspect fields. The names embedded in a PDF may differ from its printed labels. Supply a JSON mapping such as {"fullName":"Asha","agree":true}. Text values, checkboxes and choice fields are supported; an unknown field name causes an error.
Flatten a final copy
Flattening AcroForm fields turns their appearances into page content so the original fields are no longer interactive. This site’s tool flattens form fields only; it does not claim to flatten every annotation, comment or stamp.
Check reader compatibility
Open the completed file in the recipient’s PDF reader, close it, reopen it and confirm the values persist. Preserve an editable original before flattening. Forms with complex JavaScript or XFA structures may require an application designed for those features.
Try the related tools
Further reading
Updated 2026-10-18. These are implementation notes and practical explanations, not a conformance certificate.