Flatten PDF — Fix Form Fields and Annotations Online Free
Flatten your PDF to permanently embed form fields and annotations into the page. Ensures consistent display in all PDF viewers.
How to flatten a PDF
- 1Upload your PDF with forms or annotations
- 2Choose what to flatten: form fields, annotations, or all
- 3Click 'Flatten'
- 4Download the flattened PDF
Features
- Embeds filled form fields as static page content
- Merges annotations and comments into the page
- Document looks identical in all PDF viewers
- Browser-based — files are not uploaded to a server
Use cases
- Lock a completed PDF form before sending or printing
- Convert an annotated PDF into a final non-editable document
- Ensure consistent PDF appearance across all viewers and printers
FAQ
Can I still edit form fields after flattening?
No. Flattening is permanent — form fields become static content.
Why flatten a PDF?
To prevent further editing, ensure consistent display across all viewers, or to reduce file size.
Does flattening affect file size?
Slightly. Removing interactive elements may reduce the file size.