Make a PDF non-editable
Short answer
To stop a PDF's form fields from being changed, flatten the document here — the fields become fixed page content, in your browser, with no upload.
Flattening is the simplest way to make the interactive parts of a PDF non-editable while keeping it looking identical. It's ideal when you want a form's answers preserved as-is.
Note this locks form fields, not the whole file — for password protection use a dedicated protect tool.
How to make a PDF non-editable
- 1Add the PDF. Choose the form to lock.
- 2Download. Fields are now fixed.
Frequently asked questions
Does this password-protect the PDF?+
No — it only makes form fields non-editable, not encrypted.
Will the look change?+
No — it looks identical; only editability is removed.