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Flattening...
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How It Works
1
Upload PDF
Drop a PDF with forms or annotations.
2
Auto-flatten
All interactive elements become static.
3
Download
Get the flattened PDF.
FAQ
What does flattening a PDF do?
Flattening converts form fields, annotations, and comments into static content. The visual appearance is preserved but interactive elements become non-editable.
Why would I flatten a PDF?
To lock form data before sharing, reduce file size, ensure consistent appearance across viewers, or prepare for archival.
Are my PDFs uploaded?
No. pdf-lib.js runs entirely in your browser.
Does it preserve visual appearance?
Yes. The flattened PDF looks identical to the original — only interactivity is removed.
Can I unflatten a PDF?
No. Flattening is permanent. Keep the original if you need to edit form fields later.
Does it flatten annotations?
Yes. Comments, highlights, and markup become part of the page content.
Does it reduce file size?
Sometimes. Removing form field metadata can reduce size, but the effect varies.
Is there a page limit?
No.
Does it work on mobile?
Yes.
What about digital signatures?
Flattening removes interactive signature fields. The visual signature is preserved as static content.
Can I flatten only specific fields?
Currently all fields are flattened. Selective flattening is not supported.
Does it work with all PDF versions?
Yes. Compatible with all standard PDF files.
How does this compare to Acrobat?
Same result. Acrobat offers more control. For form filling, use <a href="/ai/pdf/fill-form">Fill Form</a> first. Acrobat offers more control over what to flatten. Our tool flattens everything — simpler and free.
Is it free?
Yes.
Can I pay with crypto?
PDF tools are free. See all <a href="/ai/pdf">PDF Tools</a>. AI writing tools accept crypto from $9.99/month.
Do more with your documents
Summarize, rewrite, or translate the text in your PDFs with AI.
Flatten PDF form fields and annotations into static content using pdf-lib.js in your browser.