Flatten PDF
Lock filled-in form fields and annotations so nobody can change them.
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Drop PDF files here
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Lock filled-in form fields and annotations so nobody can change them. Your files are processed right here in your browser, so they are never uploaded to a server.
How to use Flatten PDF
- Choose or drop your PDF files into the box above.
- Check the options on the right. The defaults work for most files.
- Press the button to run Flatten PDF and download the result.
Questions, answered
Is Flatten PDF free?
Yes. Flatten PDF is free to use and you don’t need an account.
Are my files uploaded?
No. This tool runs entirely in your browser, so your files never leave your device.
Does it work on my phone?
Yes. It works in any modern browser on Android, iPhone, tablets and computers. Very large files are faster on a computer.