Flatten PDF

Flattening turns each form field and its drawn value into ordinary page content, so no PDF viewer can re-select or re-type what you filled in. It is one-way: keep the original if you expect to edit the form again. A digital signature stops being valid once its document is flattened, and XFA-only forms are beyond this engine; when one is detected the report says so. Visual fidelity is the appearance streams' own, not guaranteed pixel-identical to your viewer's on-screen fill. Everything runs in this tab; the document never leaves your device.