Optimize
Flatten PDF
Lock in form fields and page content.
Drop files here, or click to browse
PDF files only · stays on this device
Private by design. Flatten fillable form fields and annotations into permanent page content so they can no longer be edited. Your file is processed entirely in this browser tab using WebAssembly — it is never uploaded anywhere, so it stays yours even on a shared or offline computer.
Frequently asked questions
- What’s the difference between the two flatten modes?
- "Flatten form fields" locks in filled-out form values as permanent page content, but text elsewhere stays selectable. "Flatten to static images" turns every page into a picture, so nothing on it remains selectable or editable.
- Why would I flatten to static images?
- It’s the most reliable way to make sure no text, form field, or annotation can be edited, copied, or extracted — useful before sharing a document you want to stay exactly as it looks.
- Does flattening to images reduce quality?
- Pages are rendered at a high resolution, so text and graphics stay sharp, but the result is no longer searchable or selectable text.