Modufile's Flatten PDF tool converts interactive form fields in a PDF — such as text boxes, checkboxes, dropdowns, and radio buttons — into static page content. After flattening, the filled-in values become permanent, non-editable text embedded in the page. This is useful when you need to share a completed form and prevent further changes, fix display issues in certain viewers, or prepare forms for archival. The tool uses pdf-lib to merge AcroForm fields into the page content, and the entire process runs locally in your browser.