Fill a PDF form and choose editable or flattened output
Updated · WaterPDF
Complete existing PDF text fields, checkboxes and choices on your device. Understand flat scans, read-only fields and editable versus flattened output.
No signup · Local file processing
Check that the PDF contains interactive fields
Click a blank area in your PDF reader. Some application forms contain interactive text fields and checkboxes; others are a flat page or scan. Fill PDF forms reads supported AcroForm fields that already exist. It does not create fields from printed lines. If no usable fields are found, Add text can place labels on a flat page.
Choose the unlocked form and review its fields
Choose a PDF up to 100 MB and 200 fields. If it asks for an opening password, use Unlock PDF with the correct password first. Read field names and existing values before changing them. Read-only, signature and unsupported fields cannot be filled here. XFA forms require an application that supports that form format.
Enter text and make deliberate choices
Fill text fields, tick the appropriate checkboxes and choose available dropdown, radio or list options. Confirm dates, names, addresses and whether a choice allows multiple selections. Supported local fonts cover Latin, Greek and Cyrillic text; complex scripts and emoji are unsupported. A text field supports its own maximum length or 10,000 characters, whichever is lower, with 50,000 submitted characters across the form. Do not treat a visual signature image as a verified certificate-based signature.
Keep fields editable when further changes are needed
The normal output retains supported interactive fields so a recipient can continue editing them. Save the filled copy and reopen it in the reader your recipient will use. Check long answers, small fields, selected options and any field appearance that differs between readers. Filling does not automatically validate an application or submit it to an organization.
Flatten only when page content is the result you need
Flattening turns supported filled fields into page content and removes their interactivity. It can be useful when a recipient only needs the completed appearance. Keep an editable original before flattening, and check the download carefully. Rewriting can invalidate an existing certificate signature; flattening is not secure redaction or proof that a form has been approved.
Review the saved copy before sharing
Compare the completed form with the original instructions. Check all field values and pages, then download and reopen the copy to confirm it saved correctly. Use Protect PDF after finishing your edits if an opening password is appropriate. When changes matter, Compare PDFs can help review the visible versions without uploading either file.
Fields, flat pages and flattened results
| Document or goal | Useful choice | Result |
|---|---|---|
| Existing text fields and checkboxes | Fill PDF forms | Supported field values in a new PDF copy |
| Printed blanks on a flat PDF | Add text | Placed labels rather than new interactive fields |
| Recipient needs to edit answers | Keep fields editable | Supported fields remain interactive |
| Recipient only needs the completed page | Flatten supported fields | Filled appearance becomes page content |
Preserve the original and review the downloaded copy. This tool does not submit forms or verify identity.