Flatten PDF
Flatten form fields and annotations into the page so they can't be edited.
Drop a PDF here or click to browse
Your file stays on your device — nothing is uploaded.
Flattening bakes form fields (text boxes, checkboxes, signatures) into the page. Afterwards they appear exactly as filled in but can no longer be edited.
100% private — your files are processed in your browser and never uploaded to a server.
The Flatten PDF tool merges interactive form fields and annotations into the page itself. After flattening, the content is fixed and can no longer be edited or changed. The whole process runs in your browser, keeping the document private.
Why use this tool
Locks in content
Form fields and annotations become permanent page content.
Consistent everywhere
Flattened PDFs display the same in every viewer.
Private and free
Flattening runs in your browser with no upload or account.
How to use it
Open your PDF
Select a PDF with form fields or annotations to flatten.
Flatten the document
The tool merges the fields and annotations into the pages.
Download the result
Save the flattened, non-editable PDF.
Frequently asked questions
What does flattening a PDF do?+
It merges form fields and annotations into the page so the content can no longer be edited.
Why would I flatten a PDF?+
To lock filled-in forms, ensure consistent display, and stop further changes before sharing.
Is my PDF uploaded anywhere?+
No. Flattening runs in your browser, so the document stays private.
Is the tool free?+
Yes, completely free with no sign-up and no watermark.