Flatten PDF

Flatten interactive AcroForm fields into page content in a new PDF copy. Other annotations are not flattened.

Free to use. No account required.

One PDF per runPDF onlyUp to 20 MBBrowser-side processing

This tool targets interactive PDF form fields only. It does not flatten comments, highlights, stamps, or other annotations.

Drop one PDF here or click to chooseOne file · PDF · up to 20 MB

Choose one PDF file to begin. The original will not be changed.

What flattening changes

Flatten PDF converts supported interactive AcroForm fields, such as text inputs and checkboxes, into page content in a separate copy. The field values remain visible, but the fields are no longer editable as form controls.

Flattening does not remove or flatten every annotation type. It is not a security redaction method: hidden or covered information may remain in the file. Check the output with the viewer and workflow you intend to use.

Review the flattened copy

  1. Choose one PDF up to 20 MB.
  2. Run the tool to flatten interactive form fields.
  3. Open the downloaded copy and verify the visible values and remaining annotations.

PDFs without interactive form fields are not processed. Encrypted, malformed, or unsupported documents may fail. Editing may invalidate a digital signature.

Frequently asked questions

Does flatten PDF remove comments and highlights?

No. This tool flattens AcroForm fields only; other annotation types are outside its scope.

Does flattening securely erase hidden data?

No. It is not a redaction or sanitization method.

Related PDF tools

Fill and Sign PDF lets you edit supported interactive fields before flattening a reviewed copy.

Only process PDFs you own or are authorized to edit.