Flatten PDF
Bake annotations, form fields, and interactive elements into the document permanently.
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PDF files up to 25.0 MB · max 5 pages
FAQ
What does flattening a PDF mean?
Flattening bakes all interactive elements — form fields, text inputs, checkboxes, dropdowns, and annotations — directly into the page content. The values become part of the fixed layout and can no longer be edited or changed.
When should I flatten a PDF?
Flatten before sharing a completed form so recipients cannot alter the filled-in data. It is also useful for archiving, printing, or ensuring consistent appearance across different PDF viewers.
What if my PDF has no form fields?
The tool still works — it will save a clean copy of your PDF. No data is lost and the output file will look identical.
Is this processed on a server?
No. Everything runs 100% in your browser using pdf-lib. Your file never leaves your device.
How It Works
Upload your PDF
Upload a PDF with form fields, annotations, or layers.
Flatten the document
Click Flatten to merge all layers, forms, and annotations into a flat PDF.
Download flattened PDF
Download the flattened PDF where all content is permanently embedded.
Frequently Asked Questions
What does flattening a PDF do?▾
Flattening converts interactive elements (form fields, annotations, layers) into static content. The visual appearance stays the same, but elements can no longer be edited.
Why would I flatten a PDF?▾
Flatten PDFs before sharing to prevent editing, reduce file size, ensure consistent display across viewers, and prepare documents for printing.
Can a flattened PDF be unflattened?▾
No. Flattening is permanent. Always keep a backup of the original if you might need to edit form fields or annotations later.
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