What does flattening a PDF do?

Flattening bakes interactive elements like form fields, checkboxes, annotations, and comments into the static page content so they can no longer be edited or removed.

When should I flatten a PDF?

Flatten before sharing a filled form to prevent recipients from changing answers, or after adding a watermark or signature to lock it in place permanently.

Is flattening reversible?

No. Once a PDF is flattened, the interactive elements are permanently merged into the page content and cannot be restored. Always keep a copy of the original.

Flatten PDF

Bake form fields, annotations, and transparent layers into static page content.

Click or drag a PDF file here

PDF only · Up to 50MB

Or import from cloud

What flattening does

•Bakes form fields and checkboxes into the page permanently
•Merges annotations and comments into the page content
•Resolves transparent elements and layers
•Ensures consistent rendering across all PDF viewers

Flatten PDF

What flattening does

Frequently Asked Questions