Flatten PDF
Flatten form fields into a more stable PDF copy so filled values are harder to edit accidentally.
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Flatten PDF details
Flatten PDF makes filled values more stable by writing field appearances into a new document copy.
File handling
- Input: One PDF with fillable form fields or supported annotations.
- Output: A more stable PDF copy with fields flattened where possible.
- Privacy: Processing runs in your browser for this live tool. PDFde does not upload the selected document contents to its servers.
Best for
- Locking filled form values into the page appearance
- Preparing a form before sharing
- Reducing accidental edits after filling
Know before using
- This focuses on fields handled by pdf-lib
- Not every annotation type is flattened
- Keep the original if you may need editable fields later
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