What PDF Form Filler does
Many application, tax and registration forms are fillable PDFs: they contain real fields for text, tick boxes, drop-down lists and options. PDF Form Filler reads those fields and shows them as a simple list you can complete in your browser — handy on a phone, where PDF apps often cannot fill forms. Save the result as a filled PDF, optionally locked so the answers cannot be changed.
How to fill a PDF form
- Add your PDF. The tool lists every fillable field it finds, using the names stored in the form.
- Type into text fields, tick the boxes and pick values from the lists.
- Optionally tick Lock the form after filling to flatten it.
- Press Save filled PDF and download.
- Open the result and check that every answer appears in the right place.
Supported field types
| Field type | Supported |
|---|---|
| Text boxes, single and multi-line | Yes |
| Check boxes | Yes |
| Drop-down lists | Yes |
| Radio button groups | Yes |
| List boxes | Yes |
| Signature fields | No — use Sign PDF |
| Dynamic XFA forms | No |
When the tool says there are no fillable fields
The PDF is a flat document: a scan, or a form exported without fields. You can still complete it by typing on top of the page with PDF Editor or PDF Annotator.
Should you lock the form?
| Leave unlocked | Lock (flatten) |
|---|---|
| You or someone else will continue filling it later | The form is final and ready to submit |
| The recipient's system reads the field values | You want the answers to look the same in every viewer |
Some organisations process the field data electronically. If the instructions say not to flatten, leave the form unlocked.
Good to know
- Field labels come from the names the form's author gave the fields. They are sometimes technical, such as “txtName1”. Fill a field, save, and check the result if a name is unclear.
- Most forms embed a font that contains only English/Latin letters, so other scripts may not display inside fields. Use Latin letters there, or add other text with the PDF Annotator.
- Fields with a maximum length will not accept more characters than the form allows.
- Calculated fields and scripts inside forms are not run. Enter totals yourself and verify them.
Use cases
- Completing bank, insurance, admission and employment forms.
- Filling the same form repeatedly with different details.
- Preparing a form on a phone when no PDF application is installed.
After filling
Sign the form, merge it with supporting documents and compress the final file if the portal has a size limit.
Privacy
The form is read and filled in your browser. Neither the PDF nor your answers are uploaded to our server.