Flatten PDF
Bake fillable form fields and annotations permanently into page content — lock applications before sending. Freeze a signed offer letter exactly as seen — local pdf-lib, unlimited saves.
Runs on pdf-lib
How to Use the Flatten PDF
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Flatten form fields and annotations in multiple PDFs at once. Convert fillable PDF forms into static documents in one batch. Everything runs locally in your browser — nothing is uploaded.
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Frequently Asked Questions
Why flatten before sending?
Unflattened forms render differently across readers — filled values can vanish or shift. Flattening bakes everything into static content so recipients see exactly what you see.
Can I unflatten later?
No — flattening is one-way. Keep an unflattened master copy, flatten only the sending copy.
Do signatures survive flattening?
Yes — drawn, typed, and image signatures bake in like everything else. Sign first, flatten last, then send.
Does flattening send files anywhere?
No — flattening runs locally in your browser on pdf-lib. Only the final save touches the network — downloads are unlimited.
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Last updated October 2026