Flatten PDF
Merge form fields and annotations into the page so they can no longer be edited.
Processed in your browser. Files are never uploaded.
Drop your PDF file here
or click to browse
Max file size: 100MB
Turn filled-in fields, checkboxes, and dropdowns into static content.
Bake highlights, stamps, drawings, and notes into the page. Links keep working.
Flatten PDF online, free and secure
Flatten a PDF to merge form fields, comments, highlights, and stamps into the page itself. A flattened PDF looks the same in every viewer, prints reliably, and cannot have its answers or annotations changed. Links keep working.
How to flatten pdf
Upload your PDF
Select the filled form or annotated PDF you want to flatten.
Choose what to flatten
Flatten form fields, annotations, or both.
Download
Save the flattened copy, ready to send or archive.
Why use Kobra PDF to flatten pdf
- Locks form answers and comments
- Consistent display and printing
- Hyperlinks stay clickable
Flatten PDF: frequently asked questions
- Why flatten a PDF?
- Flattening stops recipients from changing form answers or comments, and avoids fields that show differently, or not at all, in some viewers and printers.
- Can I undo flattening?
- No. Keep the original file if you may need to edit the form or annotations again.
- Does flattening hide sensitive content?
- No. Flattening keeps everything visible. To permanently remove sensitive content, use Redact PDF.
- Is my file uploaded?
- No. Flattening happens in your browser.