Flatten PDF

Flatten form fields into page content.

Utility Local-first processing
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Drop files here Choose PDF files or images depending on the selected tool. PDF files are processed locally in this browser tab.

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Flatten form fields into page content.

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Flattening writes your filled form fields into the page itself, so the answers stay visible but no field is left to retype or clear. It works on AcroForm fields only: layers, comments and page graphics are untouched, and no page is turned into an image. The whole run happens in this browser tab.

Never leaves your device

The PDF is read, flattened and saved by your own browser. There is no upload step and no server that could keep a copy of your document.

Only the form fields

Filled AcroForm fields become part of the page and stop being editable. Layers, comments and page graphics are left exactly as they were.

Nothing to configure

No settings, no sliders, no options to weigh up. Drop the file in and the flattened copy is ready to download moments later.

How to flatten a PDF form

  1. Add your PDF

    Drag the file onto the workspace or pick it from your device. There is no account to create and no sign-up in the way.

  2. Flattening starts itself

    There is nothing to set, so the run begins as soon as the file loads, and it repeats on its own if you swap in a different PDF.

  3. Download the result

    You get a new file named after the original with -flattened added, and no watermark is stamped anywhere on the pages.

Flatten PDF FAQs

What does flattening a PDF actually do?

It takes the values typed into the PDF's form fields and draws them into the page itself. The text stays visible in the same place, but the field behind it is gone, so a reader can no longer edit or clear that entry.

Does it flatten layers or OCGs?

No. Optional content groups and layers are untouched, because this tool handles AcroForm form fields and nothing else. Merging layers into one flat page is a different job from this one.

Are comments and annotations flattened too?

No. Sticky notes, highlights and other annotations are still annotations after the run, and pages are never rasterised. Only filled form fields are converted into fixed page content. Annotate PDF

What happens if my PDF has no form fields?

The file comes out essentially unchanged. With no fields there is nothing to flatten, so pages, text and images pass straight through. It is worth checking that your PDF really is a form first.

Can I edit the fields again afterwards?

No, and that is the point: the values are page content now, so there is no field left to type into. Keep your original if the answers might still change, and send the flattened copy instead.

Will flattening break a digital signature?

A signature covers the exact bytes it was applied to, and flattening writes a new file, so that signature stops validating. Keep the signed original if the signature has to stay verifiable, and treat the flattened copy as a separate, unsigned document. Fill and Sign PDF

Is my document uploaded anywhere?

No. The work happens entirely in your browser, so the PDF never travels to a server. Nothing caps the file size either, though on a very large document the limit is the memory your device has free. Everything you download was made on your own machine.

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