What does flattening a PDF do?

Flattening converts the PDF's interactive AcroForm fields — text boxes, checkboxes, radio buttons, dropdowns — into permanent, static page content. The values you see stay exactly as they are, but they can no longer be edited or filled in. General markup annotations like sticky notes or highlights, which aren't form fields, are left as they are.

What if my PDF has no form fields?

If the PDF has no interactive fields to flatten, the file is returned unchanged — flattening simply has nothing to do in that case.

Will the appearance of my PDF change?

No. Flattening preserves how the document looks. Filled-in values remain visible exactly as they appeared before, they simply become part of the static page content instead of an editable field.

Can I flatten a password-protected PDF?

No, password-protected PDFs cannot be flattened. Remove the password protection first using your PDF reader, then flatten the file.

Does flattening affect comments or highlight annotations?

No. Flattening specifically targets AcroForm fields — text boxes, checkboxes, radio buttons, dropdowns. Non-form markup like sticky notes or highlights isn't a form field and stays interactive.

Flatten PDF Online

Turn fillable form fields and annotations into permanent, non-editable PDF content in one click.

Drop your file here, or click to browse

.pdf · max 20 MB

FloxerFile lets you flatten a PDF so that fillable form fields, checkboxes, and annotations are baked directly into the page content and can no longer be edited. This is useful once a form has been filled out and you want to lock the values in place before sharing or archiving the document. No software, no sign-up, just upload and download.

How it works

1
Upload your PDF
Drag and drop your PDF or click to browse. Files up to 20 MB are supported.
2
Flatten
Click Flatten PDF. Every form field and annotation in the file is converted into static page content on our servers.
3
Download your flattened PDF
Download the flattened PDF — the filled-in values remain visible but are no longer editable form fields.

Features

Form fields locked in place
Text fields, checkboxes, radio buttons, and dropdowns are converted into static page content.
One click, nothing to configure
There are no options to set — every fillable field in the document is flattened in a single pass.
Layout preserved
Page size, text, images, and formatting are preserved exactly as filled in.
Targets AcroForm fields specifically
Text boxes, checkboxes, radio buttons, and dropdowns (the PDF's interactive AcroForm fields) are converted to static content — general markup like sticky-note comments isn't a form field and is left untouched.

Supported formats

.pdf

PDF (all versions)

Standard PDF files from any source, including forms with AcroForm fields. Password-protected PDFs are not supported.

Output format: .pdf

Frequently asked questions

What does flattening a PDF do?: Flattening converts the PDF's interactive AcroForm fields — text boxes, checkboxes, radio buttons, dropdowns — into permanent, static page content. The values you see stay exactly as they are, but they can no longer be edited or filled in. General markup annotations like sticky notes or highlights, which aren't form fields, are left as they are.
What if my PDF has no form fields?: If the PDF has no interactive fields to flatten, the file is returned unchanged — flattening simply has nothing to do in that case.
Will the appearance of my PDF change?: No. Flattening preserves how the document looks. Filled-in values remain visible exactly as they appeared before, they simply become part of the static page content instead of an editable field.
Can I flatten a password-protected PDF?: No, password-protected PDFs cannot be flattened. Remove the password protection first using your PDF reader, then flatten the file.
Does flattening affect comments or highlight annotations?: No. Flattening specifically targets AcroForm fields — text boxes, checkboxes, radio buttons, dropdowns. Non-form markup like sticky notes or highlights isn't a form field and stays interactive.

Related tools

Organize PDF

Reorder or remove pages in a PDF.

Compress PDF

Reduce the size of your PDF files while maintaining acceptable quality.

Ready to flatten your PDF?

Upload your file above and lock its form fields in seconds.