How to Flatten a PDF
Filled out a PDF form and want to lock those answers in before sending it on, so no one can change a checkbox or a text field later? Serbabisa's Flatten PDF tool bakes every form field's current value into the page itself, entirely on your device.
OPEN THE TOOLFlatten PDFStep by step
- 1Open the Flatten PDF tool
Choose Flatten PDF from the directory to open the dropzone.
- 2Drop your PDF
Drag the file in or click to browse. Serbabisa reads the page count so you can confirm it's the right document.
- 3Review the note
Flattening bakes form fields and their filled-in values into the page, so read the note confirming they'll no longer be editable before continuing.
- 4Flatten and download
Press Flatten PDF, then download the file with its form fields locked in place.
Frequently asked
What exactly gets flattened?
Interactive form fields, text boxes, checkboxes, and similar widgets, along with whatever values were filled in. Their current appearance is baked into the page and the editable widget is removed.
Can I undo this later?
No, flattening is permanent. Keep a copy of the original if you might need to edit the form fields again.
What if my PDF has no form fields?
Serbabisa still returns a clean copy of the file, there's simply nothing to flatten.
Ready to try it?
Do it now, and your file never leaves the tab.