Flatten PDF

Flatten form fields and annotations into the page so they cannot be edited or lost.

PDF Tools🔒 Private: runs in your browserFree · no sign-up
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How to use Flatten PDF

  1. Add your PDF. Click the upload area or drag and drop your file (PDF). Nothing is uploaded; it stays on your device.
  2. Choose your options. Adjust the settings for Flatten PDF if they are shown, or keep the defaults for a quick result.
  3. Run Flatten PDF. Press the "Flatten PDF" button and wait a moment while your PDF is processed.
  4. Download the result. Your PDF result downloads straight away. Process another file whenever you like, with no limits or sign-up.

Why use Flatten PDF?

  • Private by design: runs in your browser, nothing is uploaded
  • Free with no sign-up and no watermark
  • Fast, with no upload or download wait
  • Works on phone, tablet and desktop

Common uses for Flatten PDF

  • Lock in a filled form before submitting it.
  • Make annotations visible in every PDF viewer.
  • Prepare a document for archiving.

Private by design

Flatten PDF runs entirely in your browser. Your PDF is read and processed on your own device and is never uploaded to our servers. Read our Privacy Policy for details.

Frequently asked questions

What does flattening do?

It turns interactive form fields into fixed page content, so values stay visible and can no longer be changed.

Is Flatten PDF free to use?

Yes. Flatten PDF is free, needs no account and never adds a watermark to your result.

Is my PDF uploaded when I use Flatten PDF?

No. Flatten PDF works inside your browser, so your PDF stays on your device from start to finish.

What file types does Flatten PDF accept?

Flatten PDF accepts PDF and produces PDF.

Is there a file size limit for Flatten PDF?

You can process files up to 50 MB each.

Does Flatten PDF work on my phone?

Yes. Flatten PDF is fully responsive and works in the browser on Android, iPhone, tablets and desktop computers.

Guides and tips

PDFFillable PDF Forms vs Flat PDFs: What's the Difference?Understanding AcroForm fields and why some PDFs let you type directly into them while others don't.

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