Turn form fields into regular page content, keeping their values but making them non-editable.
Quick answer
To flatten a PDF, open PDFella's Flatten PDF tool, upload the file and click Flatten PDF. Form fields and their current values become part of the page, so they look the same but can no longer be edited. Download the flattened PDF.
Updated 5 October 2026 by the PDFella team
Key facts
Step by step
Drag your PDF onto the upload area or click Choose file. It's opened in your browser. Nothing is uploaded.
Every form field is converted into page content with its current value.
Rename the file if you like and click Download, or open it in the editor to keep working.
Why PDFella
Filled-in answers stay exactly as they appear.
Fields are no longer editable in any reader.
Your PDF never leaves your device.
No sign-up, no watermark.
Flatten forms before sending them back so answers can't be changed, before printing to ensure every value appears, or before archiving. You can also flatten while saving in the editor.
HR
Lock completed onboarding forms.
Lawyers
Finalise filled court forms.
Anyone
Make sure printed forms show every answer.
It converts form fields into normal page content so their values can't be edited.
No. Current values are kept on the page.
No. Flattening runs in your browser.
Yes, with no account.
Not in the flattened file. Keep your original if you might need to edit it.
Yes. Choose Flatten form fields in the editor's save dialog.