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Flatten PDF (Lock Forms & Notes)

Bake form fields and annotations into the page so they can't be edited. Safe or full-raster mode — no upload on server, no watermark.

Drop a PDF to flatten

PDF — up to 100 MB

Tip: you can also paste an image with ⌘V / Ctrl V

Flatten mode

Choose a PDF, pick a flatten mode, and get a locked-in copy.

How this works — and why it's private

Safe mode uses pdf-lib to flatten form fields — form values become part of the page.
Full mode redraws each page with pdfjs at your chosen DPI so annotations and highlights become uneditable image pixels.
Both modes run entirely in your browser. Your document never leaves your device.

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