Text fields (single-line and multiline), checkboxes, dropdowns, radio buttons, and option lists. These cover the standard interactive form fields found in most fillable PDFs.
Flattening converts the filled form fields into static content. The values become permanent and the fields can no longer be edited. This is useful when sharing a completed form.
Yes. Only the form field values are updated. All pages, layout, fonts, and other content remain exactly as they were in the original PDF.
No. All processing happens entirely in your browser. Your file never leaves your device.