Flatten PDF forms privately
Flatten supported standard PDF form fields into page content locally in your browser, creating a separate non-editable copy.
Private
Files stay on your device
Fast
Built for quick results
Browser-based
No software installation
Simple
Upload, process, download
Select one PDF form
Choose the standard PDF form you want to flatten.
PDF ยท Maximum 25 MB
You can drag files here or use the browse button above.
How it works
How to flatten a PDF form
Choose a PDF form
Select a PDF containing standard AcroForm fields.
Review the detected fields
Kukureku checks that the PDF contains standard fields and refuses XFA forms.
Flatten and download
Convert the current field appearances into ordinary page content and download the new copy.
Helpful tips
Get the best result
Best for completed standard forms
Flattening converts current AcroForm field appearances into ordinary page content.
Keep the editable original
The flattened copy is no longer fillable, so keep your source PDF if you may need to edit the form again.
XFA forms are refused
Dynamic XFA forms are not flattened because this browser engine cannot preserve XFA safely.
Frequently asked
Common questions
What does flatten PDF mean?+
It turns supported standard interactive form fields into non-editable page content in a new PDF copy.
Will every PDF work?+
The tool is designed for standard AcroForm PDFs. XFA forms are refused, and unusual custom widgets may not flatten correctly.
Is my PDF uploaded?+
No. Detection, flattening, and saving happen locally in your browser.
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