Flatten PDF: Lock Form Fields in Place
Interactive application forms and surveys can shift or lose data when fields remain editable during forwarding. Flattening converts the filled form fields into fixed page content. The tool only locks existing form fields and preserves comments. Processing happens entirely in your browser, so sensitive forms never leave your device.
Step by step
- Open the Flatten PDF tool and load the completed form locally.
- Scroll through all pages to confirm every field is filled correctly.
- Run flattening to convert form fields into static content.
- Download the flattened PDF and test that fields no longer accept typing.
- Verify comments remain visible, then archive the locked copy.
Example scenario
A school secretary collects permission forms filled digitally by parents. Before sending them on, she opens the tool, loads the completed form, and exports a flattened version. The text remains readable and reviewers see exactly what the parents submitted.
Check your result
Open the flattened copy and click on former fields to confirm they no longer accept input. Verify signatures and page content look unchanged. Check that comments remain visible. Archive this locked copy separately and keep the fillable original only if further edits are expected.
Frequently asked questions
What does flattening do?
It converts interactive form fields into static page content. Comments are preserved.
Will it remove my comments?
No. Only form fields are locked.
Are files uploaded to a server?
No. Flattening runs in your browser.
Can I edit the form after flattening?
Not as interactive fields. Keep the original fillable file separately.
Keep an original copy before processing your file. Examples are illustrative; results depend on your document.