Flatten a PDF right in your browser — no upload, no signup, nothing stored. Flattening merges form fields, annotations and layers into the page itself, so the content becomes permanent and can no longer be edited or accidentally changed. It is the standard final step before sharing a filled-in form, and it happens entirely on your own device.
How to Flatten a PDF
Upload your PDF
Drop your PDF or click to browse. Nothing is uploaded — it all stays on your device.
Apply the change
The tool processes your PDF instantly, right in the browser.
Download the result
Save the finished PDF. Because nothing was uploaded, there is nothing to delete afterwards.
Is it private?
Yes. Everything happens inside your browser using your own processor. Your file is never uploaded, stored or seen by anyone, which makes it safe for confidential documents. When you close the tab, nothing remains.
Common Uses
- Locking a filled-in PDF form so recipients can see the answers but not alter them.
- Making sure annotations and comments print and display the same for everyone.
- Preparing a PDF for archiving where the appearance must never change.
- Fixing forms that display differently in different PDF readers by baking the values in.
- Reducing the risk that interactive fields get cleared or broken when a file is re-saved.
Tips & Things to Know
Everything stays on your device
This tool runs entirely in your browser, so it is safe for private, internal or client work — and it keeps working offline once loaded.
No installation or account
It works in any modern browser on any device, with nothing to install and no signup. Completely free, no watermark, no limit.
Frequently Asked Questions
What does flattening a PDF do?
It merges form fields, annotations and layers into the page content, making them permanent and non-editable while keeping the exact appearance.
Is my PDF uploaded anywhere?
No. Flattening runs entirely in your browser, so your document never leaves your device.
Will flattening change how my PDF looks?
No. The visible result is identical — only the underlying editability is removed.
Does it work on filled-in forms?
Yes. This is the most common use — it locks in the values a form contains so they cannot be changed.
Is it free?
Completely free, with no signup, no watermark and no limit.