Flatten PDF
Lock form fields into plain page content.
Flatten a filled form so the answers become permanent page content: fields stop being editable, checkboxes freeze, and every viewer — and printer — shows exactly what you see.
Flattening happens in your browser. It is the standard last step before sending a filled form anywhere official.
How it works
Drop a filled PDF form into the box above.
Click “Flatten”.
Download the locked copy.
Why this tool
No more accidental edits
Form fields become regular page graphics — nobody can click into your answers and change them.
Prints exactly right
Some printers skip form-field content; flattened files print what the screen shows, always.
Local processing
Filled forms are often personal — they never leave your device here.
Frequently asked questions
Can flattening be undone?
No — that is the point. Keep your original filled file if you may need to edit the answers later.
My PDF has no forms — will flattening change it?
No, a PDF without interactive fields passes through unchanged.
Does it flatten annotations and comments too?
This tool flattens form fields. Sticky-note comments are a separate layer and are left as-is.
Is my form uploaded?
No — everything runs in your browser.