📄
Flatten PDF
Lock annotations and forms into the PDF
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Merge, split, compress, convert, edit, and secure PDF tools for free directly in your browser
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🔍Niche Features
What is Flatten PDF?
Flattening a PDF merges all interactive elements — form fields, annotations, comments, and signature fields — into the static page content, making them permanent and non-editable.
After flattening, the document behaves like a plain scanned page: all visible content is preserved as-is, but form fields can no longer be filled, annotations can no longer be selected or moved, and signature fields are locked in place.
Use cases: finalizing a completed form before archiving, locking annotations in a reviewed document before distribution, preventing further editing of a signed agreement, or preparing a PDF for systems that don't support interactive elements.
How-to
- 1
Upload File
Select your PDF.
- 2
Flatten
Click the flatten layer button.
- 3
Download
Download the flattened PDF.
Frequently Asked Questions
Can I edit annotations after flattening?▼
No. Once flattened, annotations are permanently fixed and cannot be edited.
Are form inputs also fixed?▼
Yes, the data entered in form fields will be fixed onto the page.
Is the PDF flattening feature free?▼
Yes, it is free.
Is the file saved on the server?▼
No, all processing is local.
Can I use it on mobile?▼
Yes.
Is the quality maintained?▼
Yes.
Is there a file size limit?▼
No.
How long does it take?▼
A few seconds.
Can I download the result multiple times?▼
Yes, in the same session.
What if an error occurs?▼
Retry if the file is corrupted.
Last Updated: August 6, 2026
