Flatten PDF

Flatten annotations and form fields permanently. Right in your browser. 100% free, privacy protected.

Flatten PDF merges annotations, form field values and layers into the page content itself, producing a document where what you see is fixed. This solves a specific, common problem: a filled form or a marked-up review copy that displays correctly for you but shows empty fields or missing comments for the recipient, because their viewer handles annotation layers differently. After flattening, the content is ordinary page data that renders identically everywhere and prints reliably. Flattening runs in your browser and accepts several files at once.

  1. Upload Files — Drag and drop your files into the upload area, or click to browse and select files from your device.
  2. Set Options — Flatten annotations and form fields permanently
  3. Download — Click the download button to save your processed file. It's ready instantly!

Frequently Asked Questions

When should I flatten a PDF?

Before sending a completed form, submitting to a system that strips annotations, or printing a marked-up document — anywhere the recipient must see exactly what you see.

Can I edit the fields afterwards?

No. That is the point: values become page content and are no longer interactive. Keep the unflattened version if you may need to change answers.

Does it flatten highlights and comments too?

Yes. Annotation markup is drawn into the page along with form values, so it survives viewers that ignore annotations.

Can I flatten multiple documents together?

Yes. Add several files and each is flattened with the same settings, returned as a ZIP.

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