Fill practical AcroForm PDF fields locally. Free, private, runs in your browser.
100% private — your files and text never leave your browser. All processing happens locally on your device.
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PDF Form Filler reads AcroForm fields in your browser and lets you fill practical text, checkbox, dropdown, radio, and option-list controls. The PDF and field values stay local throughout the workflow.
Some PDFs use XFA packages, JavaScript calculations, or custom widgets that do not expose standard AcroForm fields. Convertful reports those limitations locally instead of pretending every form is editable.
You can keep fields editable for another person or flatten supported fields into page appearances before sharing. Flattening is convenient, but it can still affect signatures and should not be treated as redaction.
The tool targets practical AcroForm fields such as text boxes, checkboxes, dropdowns, radio groups, and option lists when pdf-lib can read them.
XFA-only forms and complex scripted form packages are not reliably supported. If no AcroForm fields are found, Convertful will tell you locally.
No. Field detection, editing, optional flattening, and PDF writing happen in the browser. Convertful does not receive the PDF or typed values.
Flattening makes supported fields part of the page appearance, which is useful before sharing. Keep fields editable if someone else still needs to change them.
Yes. Saving a modified PDF changes the file bytes and can invalidate signatures or certification. Keep a signed original if that matters.