Fill a PDF form

Fill in the actual fields, right where they appear. Everything happens on your device.

Drop a PDF here, or click to choose one

Fields are detected automatically once your file loads.

How to fill a PDF form

1
Add your file
Drop a PDF into the box, or click to browse and select one from your device.
2
Fill in the fields
Type, check, or select directly on the page, right where each field actually appears.
3
Switch pages if needed
Use the strip below the preview to move between pages that contain fields.
4
Choose whether to flatten
Leave fields editable, or check Flatten to lock the final values in place.
5
Save and download
Click Save PDF and download the result. Nothing was ever sent to a server.

How this works

Every tool on this site runs entirely inside your browser, no files are ever sent to a server. Your form's fields are read locally, and the filled PDF is built locally too. You can confirm this yourself by opening your browser's developer tools and watching the network tab while you fill in a form.

Plan the final copy before flattening

The completion panel helps you move through detected fields, but it does not decide whether your answers are correct. Review required fields and revisit each page before saving. Leave Flatten unchecked when another person still needs to edit the form; flatten only a final copy because it converts the field values into page content and removes those interactive controls. Digital signature fields are not completed here. Save the form first, then use Sign PDF to place a visual signature if that meets the document's requirements. If no fields are detected because the form is scanned or already flattened, use Add text and annotations instead.

Frequently asked questions

What kinds of form fields does this fill in?

Text fields, checkboxes, dropdowns, multi-select option lists, and radio groups. Buttons and digital signature fields are not offered as fillable controls. Buttons trigger actions rather than hold a value, and this tool does not create certificate-based digital signatures. Use Sign PDF only when a visible signature image is appropriate.

My PDF has no fillable fields, what happened?

Not every PDF that looks like a form is actually built with real form fields, some are just images or flat text laid out to look like one. If that's the case here, our Add Text and Annotations tool lets you place text anywhere on the page instead.

What does the Flatten option do?

Flattening turns your filled values into permanent page content and removes the ability to edit them further. Leave it unchecked if you want the recipient to still be able to adjust answers, check it if this is the final version and you want it locked in.

Why do I see a message about an unsupported form type?

A small number of PDFs, mostly from enterprise software, use a dynamic form format called XFA instead of the standard fields most tools support, including this one. If you see that message, the form needs to be filled in a tool built specifically for XFA, such as Adobe Acrobat.

Are radio buttons always positioned exactly right?

In the large majority of PDFs, yes. In rare cases where a form's internal structure is unusual, a radio option's position could be slightly off from how it looks in other viewers. If something looks wrong, it's worth a quick check before sending the file on.

Next steps

Choose another private, browser-based tool for the next step in your document workflow.