Flatten PDF
Bake form fields and annotations into the page.
Drop a PDF here or click to browse
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A filled PDF form is still a form: the fields stay live, the values stay editable, and different readers render them differently. Flattening draws all of it into the page itself, so what you send is what everyone sees — and nobody can quietly change a figure afterwards.
How it works
- 1
Upload the PDF
Drop in the filled form or annotated document.
- 2
Layers are merged
Form fields, comments and annotations are rendered into the page content.
- 3
Download
The result is an ordinary PDF whose appearance no longer depends on the reader.
Why use this tool
Values cannot be edited back
Once flattened, filled fields are page content rather than editable widgets.
Renders identically everywhere
Readers disagree about how to draw form fields and annotations. Flattened pages leave nothing to disagree about.
Accepted by systems that reject forms
Plenty of upload portals and archives refuse PDFs containing interactive fields.
Often smaller
Dropping the interactive layer usually shrinks the file.
Frequently asked questions
Can flattening be undone?
No. The interactive layer is gone once it is drawn into the page, which is the point. Keep the original if you may need to edit the fields again.
Does the text stay selectable?
Yes. Flattening merges the interactive layer into the page; it does not turn the document into an image, so text stays selectable and searchable.
What happens to a digital signature?
A cryptographic signature does not survive a rewrite of the file. Flatten before signing, never after.
Will it remove a password?
No — that is a separate operation. Use Unlock for a document you have the password to.