What does flattening a PDF mean?

Flattening merges interactive elements like form fields and annotations into the static page content. The result is a non-editable PDF where the filled-in values and annotations are permanently part of the page.

Why would I flatten a PDF?

Flatten a PDF before sharing to prevent recipients from editing form fields or removing annotations. It also ensures the document looks identical in all PDF viewers and reduces file size by removing the interactive form structure.

Can I flatten only form fields or only annotations?

Yes. You can choose to flatten form fields only, annotations only, or both. This gives you control over which interactive elements are made permanent.

Is flattening reversible?

No. Once a PDF is flattened, the form fields and annotations cannot be restored. Always keep a copy of the original PDF before flattening.

Does flattening reduce file size?

Yes. Removing the interactive form structure and annotation data typically reduces file size, especially for PDFs with many form fields.

How long are files stored?

All uploaded and processed PDF files are automatically deleted within 5 minutes. Files are never shared with third parties.

Flatten PDF

Bake form fields and annotations permanently into your PDF. Makes the document static, non-editable, and universally compatible.

Flatten form fields Flatten annotations Remove interactivity Universal compatibility Preserves visual appearance Free, no signup

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Flatten Options

Flatten Form Fields

Text inputs, checkboxes, dropdowns and radio buttons become static text

Flatten Annotations

Stamps, highlights, comments, ink drawings baked into the page

What flattening does: Converts all interactive elements into static page content.

After flattening, form fields can no longer be edited, annotations cannot be moved or deleted, and the document looks identical in all PDF viewers.

This is irreversible - keep a copy of the original if needed.

Why Flatten a PDF?

Lock Form Data

Prevent recipients from changing filled-in form values. Ideal for contracts, applications, and official documents.

Universal Compatibility

Flattened PDFs render identically in every viewer - no missing fonts, no broken form fields, no rendering differences.

Bake Annotations

Stamps, signatures, highlights and comments become permanent page content that cannot be removed or altered.

Reduce File Complexity

Removing interactive layers can reduce file size and eliminate compatibility issues with older PDF readers.

Print-Ready Output

Flattened PDFs print exactly as they appear on screen - no interactive elements to confuse print drivers.

Secure Sharing

Share documents knowing recipients cannot modify form fields or remove annotations you've added.