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Flatten PDF

Lock filled-in forms, comments and signatures into the page so they can't be changed.

  • Free
  • No sign-up
  • Works on any device

Choose file or drag it here

    About Flatten PDF

    Flattening merges form fields, comments, annotations and signatures into the page itself, so they become part of the content and can no longer be edited. Do it before sending a filled form or a reviewed document. A flattened form cannot be filled in again.

    How to use Flatten PDF

    1. Choose your files, or drag and drop them onto this page.
    2. Choose the options you want. The defaults suit most files.
    3. Press Convert, then download the result.

    Why use this tool?

    Also known as

    Frequently asked questions

    Can I undo flattening later?

    No, the fields become plain page content. Always keep an unflattened copy in case you need to edit the form or answers again.

    Is Flatten PDF free?

    Yes. Flatten PDF on Toolipedia is free to use, with no sign-up and no watermark.

    Is it safe to use?

    Yes. Your files travel over an encrypted connection, are processed automatically, and are deleted as soon as the result is ready. Nobody looks at them.

    Does it work on my phone?

    Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.

    How big can my files be?

    Up to 200 MB in total. You can add several files at once.

    Do I need an account?

    No. Just open the page and use the tool. There's no sign-up and no email needed.

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