PDF Forms

Form mode

Fill existing fields or use Design mode to create and arrange supported fields.

Field type

Choose the kind of input before adding it to the page.

Field name and Help text

Give each field a useful identifier and an explanation for the person filling it.

Required and Read-only

Mark necessary answers or prevent ordinary editing of a field in compatible readers.

Value, Selected value and Checked

Set the current answer using the control appropriate to the field type.

Default value, Default choice and Checked by default

Set the starting answer for a field.

Choices (one per line)

Supply options for a choice field.

Font, Text size (0 for automatic) and Text color

Adjust the appearance of supported text fields.

Character limit (0 for no limit)

Limit the length of an answer when a field has a fixed format.

Left (pt), Top (pt), Width (pt) and Height (pt)

Position and size the field on the page.

Field tab order

Move fields earlier or later to control keyboard navigation.

Duplicate field

Create another field from the selected one and review its name and position.

Delete field

Remove the selected field from the form design. Undo restores a mistaken deletion.

Undo and Redo

Step back or forward through changes to the form design.

Save an edited copy. Its digital signature will no longer be valid.

Shown for signed PDFs. Saving changes invalidates the original digital signature; keep the signed source separately.

Process all files

Choose multiple inputs for pdf forms. This runs the settings above separately for each file, shows individual results and failures, and offers Cancel file, Cancel all files and Download batch as ZIP. Check that page positions or form fields suit every input.

PDF documents. An opening password is required when the file needs one to be read.

Local tests used synthetic 10, 50, 100 and 200 MB PDFs containing large images. Chromium, Firefox and WebKit: completed 10, 50, 100, 200 MB.

Chromium, Firefox and WebKit: completed 50, 300, 1000 text pages.

PDF forms was tested on a 16 GB Mac with Chromium, Firefox and WebKit. These are observed examples, not guaranteed limits on your device. WebKit tests do not replace a check in Safari on your own device.

Up to 100 input files and 512 MB total; up to 200 output files or 512 MB. ZIPs over 128 MB need Chrome/Edge direct disk saving; use individual downloads in other browsers. The Workflow stress test completed 100 synthetic files in all three engines; this does not guarantee the same capacity for every conversion.

Flatten PDF can turn supported saved field appearances into ordinary page content. Keep an editable original if you may need to change the answers later. Flattening is not a guarantee against other PDF editing.

No. Some forms use unsupported features or have missing saved appearances. Follow the tool’s message for the affected file and check the downloaded result in a PDF reader.

Fill existing fields or use Design mode to create and arrange supported fields.

Choose the kind of input before adding it to the page.