Your PDF Form Filler
Upload a fillable PDF and this tool detects its real AcroForm fields — text boxes, checkboxes, dropdowns and radio buttons — lets you fill them.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Illustration. Open the tool for the real thing.
See it in action
Sample input: File = sample.pdf
What is the PDF Form Filler?
Many official PDFs — applications, tax forms, intake sheets — are built with real interactive AcroForm fields: text boxes, checkboxes, dropdowns and radio buttons defined inside the PDF's own structure. This tool loads your PDF with pdf-lib and reads its actual embedded form fields, generating a real input for each one based on its real type, rather than making you print and hand-write or awkwardly type over a flattened image.
Fill in every field directly on the page, then rebuild the file — pdf-lib writes your answers into the PDF's real AcroForm field values (optionally flattening them into permanent page content) and the completed PDF downloads ready to submit or print, with every field's real value embedded in the file, not just visually overlaid.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Detects the PDF's actual embedded text, checkbox, dropdown and radio button fields, not just guessed text positions.
Text fields get a text box, checkboxes get a checkbox, dropdowns get a real dropdown — matching the form's real design.
Choose to keep fields editable in other PDF readers, or flatten them into permanent, non-editable page content.
Rebuilt with pdf-lib so the downloaded file is a standard, fully valid PDF any reader can open.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
Anyone filling out an official application or intake form
Type directly into the real form fields instead of printing and handwriting.
Try it freeHR and admin staff processing fillable PDF forms
Fill and return forms digitally without a separate PDF editor subscription.
Try it freeAnyone who needs to submit a completed PDF by email
Produce a real, properly filled PDF ready to send, not a photo of a handwritten page.
Try it freeHow it compares
A plain look at this tool next to the usual alternative.
| This utility | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
Does this work on any PDF?
It works on PDFs that contain real, embedded AcroForm interactive fields. A form that's only a flat scanned image with no interactive fields has nothing for this tool to detect — check whether the original PDF shows clickable fields in a standard PDF reader first.
Are my answers really saved into the PDF, or just shown on screen?
They're written into the PDF's real AcroForm field values using pdf-lib and included in the downloaded file — any standard PDF reader will show your entered values when opening the completed file.
What does 'flatten' mean and should I use it?
Flattening converts your filled-in answers from editable form fields into permanent, fixed page content — use it if you want to prevent further editing after you send it; skip it if the recipient should still be able to adjust fields.
Can it handle checkboxes and dropdowns, not just text?
Yes — each field is filled using the correct real input type read directly from the PDF's own form definition: checkboxes as checkboxes, dropdowns as dropdowns, radio buttons as radio buttons.
Is the PDF uploaded to a server?
No, it's loaded, filled and rebuilt entirely in your browser with pdf-lib; the file never leaves your device.
More free tools
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Try the PDF Form Filler now
Fill in the real AcroForm fields of an uploaded PDF form and download the completed file. Free to use.
Try it free