Fill PDF Form

Fillable PDF forms — tax forms, applications, registration sheets — have typed fields, tick boxes and drop-down lists built in. This tool fills them without Acrobat: it reads every field, gives you a plain list to edit, and writes your answers back into the real form fields, so the PDF stays fillable or can be flattened for submission. The PDF is processed in your browser and never uploaded.

How to use this tool

1. Choose the fillable PDF and press the button with "Field values" empty.
2. Copy the template: one "Field name = value" line per field, with the choices for tick boxes and lists.
3. Paste it into "Field values" and change the values (yes/no for tick boxes, one of the listed options for choices).
4. Tick "Flatten" if the answers must not be changed later, then press the button again and download the filled PDF.

Formula

Each line is split at the first "=": the left part must match a field name (capital letters are ignored), the right part is the new value. Text fields respect their maximum length, tick boxes accept yes/no, true/false, on/off or 1/0, and choice fields must match one of their options; several choices in a list box are separated with |.

Unchanged lines are ignored, so you can leave the whole template in place and edit only the answers you need. Read-only fields are reported and skipped.

Example

A registration form lists First name = , Country = Korea with the choices Korea | Japan | USA, and Newsletter = no. Changing the lines to "First name = Min-jun", "Country = Japan" and "Newsletter = yes" fills three fields; the result table shows each value before and after, and "Fields filled" is 3.