Why would I flatten a PDF?

Flatten PDFs to finalize documents, prevent future edits, ensure consistent printing, reduce file size, or prepare for archival.

Will flattening remove form fields?

Yes, form fields become static content. The filled-in data remains visible but can no longer be edited.

Can I undo flattening?

No, flattening is permanent. Keep a copy of your original PDF if you might need to edit it later.

Does flattening reduce file size?

Often yes. Removing interactive elements and merging layers can reduce file size, especially for PDFs with many annotations or form fields.

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Free PDF Tool

Flatten PDF

Merge all layers, form fields, and annotations into a single flat layer. Perfect for finalizing documents, preventing edits, and ensuring consistent printing.

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How to Flatten a PDF

Three simple steps. No account needed.

Upload your PDF

Click the button above or drag and drop the PDF you want to flatten.

Review and flatten

Preview your document and click flatten to merge all layers, form fields, and annotations.

Download flattened PDF

Download your flattened PDF with all content merged into a single, uneditable layer.

Frequently Asked Questions

Everything you need to know about this tool.

Flattening merges all layers, form fields, annotations, and interactive elements into a single flat layer. The content becomes part of the page and cannot be edited.

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No account needed. No software to install. Your files stay private on your device.