Flatten PDF Form Online — Lock Filled Fields
Use this after filling a form when you need a locked copy for email or portal submission. Field values become normal page content.
Files stay on your device.This tool processes your file in the browser. Nothing is uploaded to a server.
How to use this tool
- Drop a filled fillable PDF into the tool below.
- Review the detected field count.
- Download a flattened PDF with answers baked into the page.
Accepted files: Filled PDF forms with AcroForm fields to lock before sending.
Drop a filled form (PDF)
Drop a file here or click to browse. Processed locally.
Your file never leaves this browser
Frequently asked questions
What does flatten mean for a form?
Field values become static page content. The form looks the same but fields are no longer editable.
Why flatten before submitting a form?
Some viewers do not display filled widgets reliably. Flattening locks answers into the page.
Can I un-flatten later?
No. Keep a fillable copy if you still need to edit answers.
Is the form uploaded?
No. Flattening runs in your browser.