Flatten PDF
Flatten fillable PDF forms so answers become permanent page content that cannot be edited. Free online and private.
Flatten PDF – Free, Private & Online
Flattening turns filled form fields into normal page content, so answers cannot be changed and they display the same in every PDF viewer.
How to flatten a PDF form online
- Click the upload area or drag and drop your file.
- Adjust the options to suit your document.
- Click the button to start — processing happens instantly in your browser.
- Download your new file.
Why use our Flatten PDF tool?
- 100% private: your files never leave your device — everything runs locally in your browser.
- Free with no sign-up, no watermark and no daily limits.
- Works on Windows, Mac, Linux, Android and iPhone in any modern browser.
Common uses
- Locking completed applications before sending
- Preventing changes to signed forms
- Fixing forms that look blank in some viewers
Frequently asked questions
Can I undo flattening?
No, keep a copy of the editable form if you may need to change answers later.
Are my files uploaded to your server?
No. The PDF is processed by your own browser, so confidential documents stay on your device.
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