Flatten PDF
Convert a filled PDF form into fixed page content so the values can no longer be edited. The output is re-checked to prove flattening worked.
How it works
- Add a PDF that contains form fields — typically one you have just filled in.
- Flatten it: each field’s appearance is drawn into the page and the interactive field removed.
- The tool re-opens the file it produced and reports how many fields remain.
Frequently Asked Questions
What does flattening actually do?
It draws each form field’s current appearance directly into the page content and removes the interactive field, so the values become part of the page like any other text.
How do I know it worked?
The tool re-opens the file it produced and counts the interactive fields that remain. It shows you that count — before and after — instead of assuming the operation succeeded.
Is a flattened PDF secure or encrypted?
No. Flattening stops casual editing of form values; it is not encryption and not a password. Anyone can still edit the resulting page content with a PDF editor.
What if my PDF has no form fields?
The file is rewritten unchanged and the tool tells you there was nothing to flatten, rather than reporting a misleading success.