I Hack PDF
English

Fill PDF forms

Fill existing text, checkbox, radio, and dropdown form fields.

Read the guide ↓

What this tool does

Enter values into supported interactive PDF form fields. Fill an existing AcroForm using the field names defined by its author, rather than placing unrelated text over a blank page.

What you can open
One PDF containing supported AcroForm fields and values for those fields.
What you will download
A PDF retaining its supported interactive fields with the supplied values.

How to use it

  1. Inspect or detect the available field names.
  2. Enter text, checkbox, dropdown or radio values that match those fields.
  3. Download the completed PDF and verify the visible values in a PDF reader.

Options explained

Field values as JSON
Provide values keyed by the exact existing form field names. Checkboxes use true or false; selection values must match available choices.

Know the tradeoffs

  • XFA forms and digital signature fields are not supported by this filling workflow.
  • A missing field name or a value outside a selection list must be corrected.

Questions about this tool

Can I fill a form made only from a scanned picture?

Not as interactive fields. Add real fields with Create PDF form or use text additions for a visual copy.

Should I flatten the form after filling it?

Only when you want a static version. Flattening removes the supported field interactivity.