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Flatten PDF

Merge form fields and annotations into the page. Flatten PDF form fields and annotations so they become permanent, non-editable page content.

Your file never leaves your device — everything is processed locally in your browser.

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How to use Flatten PDF

  1. Drop your file into the upload box above (or click to browse).
  2. Adjust the options to your liking.
  3. Click the process button — everything runs instantly in your browser.
  4. Download your result. Your file was never uploaded anywhere.

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Annotate PDFDraw, highlight and write on PDF pages.Add Watermark to PDFStamp custom text across every page.Protect PDFEncrypt your PDF with a password.Compress PDFReduce PDF file size while keeping quality.Merge PDFCombine multiple PDFs into one file.

Part of 23 PDF Tools on fltools — all free, all on-device.