PDF Form Flattener

Flattening a PDF form combines the interactive form fields (such as text input fields, dropdown menus, and checkboxes) directly into the page's background graphics. This locks the entered values and makes the document read-only, preventing anyone from editing or modifying the form data.

Our tool opens your document locally in the browser using the pdf-lib parser, locates the AcroForm interactive form catalog object inside the PDF index tree, calls the flattening function to draw form inputs onto page layouts as static vector nodes, and removes the form field descriptors. No documents leave your device.

Yes. Flattening locks any visual signatures, text inputs, dates, and checklists into the background content layer, ensuring they cannot be relocated or altered by subsequent viewers.