smallpdf.app
← All tools View & Edit

Fill PDF Forms

Complete detected fields or add answers anywhere on the page.

Drop your PDF here

or choose a file from your device

PDF only · Up to 50 MB and 100 pages
Signature

Create your signature

Draw inside the box using your mouse or finger.
View & Edit guide

How to use Fill PDF Forms

Complete interactive forms and printed-style forms in one focused workspace.

Three simple steps

  1. Choose a PDF form and complete any detected fields.
  2. Add manual text, dates, checkmarks, or a visible signature where needed.
  3. Choose whether to flatten detected fields and download the completed PDF.

Supported forms

  • Standard text, checkbox, radio, and choice fields are detected when available.
  • Manual items work on documents that were not created as interactive forms.
  • Unsupported XFA or malformed widgets remain visible but may require manual placement.

Frequently asked questions

Can I fill a PDF that has no interactive fields?

Yes. Place manual answers anywhere on the page.

Is the signature certificate-backed?

No. It is a visible signature mark and does not verify identity.

Which interactive fields are detected?

Standard text, checkbox, radio, and choice fields are supported when available.