Flatten
Make form fields un-editable.
Frequently Asked Questions
What does flattening a PDF actually do?
Flattening merges all interactive form fields, annotations, checkboxes, and typed text permanently into the static page canvas of the PDF. After flattening, the form data becomes part of the visible page and can no longer be edited or deleted.
Why do government portals require flattened PDFs?
Flattened PDFs are tamper-proof — recipients cannot change the entered form data. Many government submission portals, courts, and financial institutions require flattened forms to ensure document integrity.
Will flattening reduce the PDF file size?
Typically yes, because interactive form data structures are removed. The reduction is usually modest (5–20%) unless the form contains many complex interactive elements.
Can I un-flatten a PDF and edit it again?
No. Flattening is a permanent, one-way operation. Once flattened, the form data is merged into the page and cannot be separated. Always keep a backup copy of the editable form before flattening.