Select a file below to fill in its form fields, entirely on your device.
How to fill a PDF form
- Choose a PDF that already has fillable form fields, then click Load form fields.
- Type or pick a value for each field that appears - text boxes, checkboxes, dropdowns, radio groups, and multi-select lists all render with the right control.
- Click Fill & download PDF to write your answers back into the file and download the completed copy - nothing is uploaded at any step.
PDF Form Filler Online
freetoolonline.com editorial teamChoose a PDF that already has form fields and this tool reads it entirely in the browser, lists every field it finds, and renders one input per field so filling it in feels like a normal web form instead of hunting through a PDF viewer. Nothing is uploaded - the file stays on your device from load to download.
Text boxes, checkboxes, dropdowns, radio groups, and multi-select lists all render with the right control and pre-fill from whatever value the field already holds. Type or pick the new values, click Fill & download PDF, and the completed file downloads immediately - the fields stay editable in other PDF software, since this tool fills values without flattening the form.
A PDF with no fillable fields gets a clear message instead of a silent failure: this tool fills fields that already exist in the file and does not add new fields to a flat or scanned page. For that kind of PDF, or for structural work like splitting, joining, or removing a password, use the other PDF tools instead. ← Back to PDF Tools
Frequently Asked Questions
Does this tool add fields to a PDF that does not have any?
No. It fills fields that already exist in the PDF (an AcroForm). It does not add new fields to a flat or scanned page and does not run OCR to detect blanks.
Is my PDF uploaded to a server?
No. The file is read in your browser with pdf-lib and never leaves the tab. The filled PDF is generated and downloaded locally as well.
Are the form fields still editable after I download the filled PDF?
Yes. This tool writes values into the existing fields without flattening them, so the downloaded PDF can still be opened and edited as a form in other PDF software.
What happens to my answers if I close the tab?
They are gone - nothing is saved. Download the completed PDF before closing or reloading the page, then reopen that file to keep working from where you left off.