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Flatten PDF
Flatten interactive form fields and annotations into permanently uneditable document layers.
100% Client-Side flattening
Select PDF document
Drag & drop or select a PDF file to flatten
Document Selected
document.pdf (0 KB)
Ready to Flatten
Choose your flattening mode on the right and click "Start Flattening".
Original Size
0 KB
Flattened PDF
0 KB
Flattening Options
Flattening fields...
Frequently Asked Questions
Quick direct-answer guides about using this utility tool locally and securely.
What does it mean to flatten a PDF?
Flattening a PDF merges interactive form fields, buttons, signatures, and annotations directly into the page content stream, making them permanent and uneditable.
What is the difference between interactive forms and visual layer flattening?
Interactive form flattening natively locks form controls (like text boxes and checkboxes) into vector shapes while keeping the text searchable. Visual layer flattening converts all pages to images, which flattens comments, annotations, and text into a fully unmodifiable, image-only document.
Can I undo PDF flattening?
No, once a PDF is flattened and saved, the layers and fields are permanently merged. We recommend keeping a backup of the original PDF if you need to edit the form later.