Flattening a PDF merges form fields, annotations and comments into the page content. The document becomes non-editable — perfect before an official submission or archiving.
How to Flatten PDF online
- 1Drop your file or click to select it (up to 10 MB).
- 2Set the options for “Flatten PDF” and click Run.
- 3Download the result. Your files are deleted automatically.
Frequently asked questions
Do the fields stay readable?
Yes, entered values remain visible but are no longer editable.
Can I flatten only forms?
Yes, tick the option to keep annotations editable.
Is it reversible?
No — keep a copy of the original if you need to edit it later.