Flatten PDF Forms & Annotations Online — Make PDF Read-Only
Flatten interactive form fields, comments, digital signatures, and vector layers into non-editable base PDF.
Flatten PDF Forms & Annotations
Flattening bakes interactive form fields, comments, digital signatures, and vector layers into the permanent base content stream of your document.
How to Use Flatten PDF
Upload Form or Document
Select the interactive PDF or annotated document.
Flatten Content
Click Flatten PDF to merge all form fields and annotation layers into fixed page elements.
Download Read-Only PDF
Save your secured document ready for archiving or official submission.
Flatten forms and annotations into a read-only PDF
Flattening merges form fields, comments and stamps into the page so they can no longer be edited. The result looks the same everywhere.
The process is local and permanent, so keep a copy of the editable version if you may need it later.
Common uses for Flatten PDF
- Finalize a filled form before submission
- Lock in signatures and annotations
- Fix forms that display differently in other viewers
- Archive documents in a stable format
Frequently Asked Questions about Flatten PDF
What does flattening a PDF do?
Flattening takes all editable form elements (text boxes, checkboxes, dropdowns) and annotations and converts them into static graphics that cannot be tampered with.
Can a flattened PDF be unflattened?
No. Flattening is a permanent one-way conversion that locks all values into the document stream for safety.