Flatten PDF bakes interactive AcroForm fields, radio buttons, dropdowns, annotations, and digital signatures directly into the static vector content of each page.
Flattening prevents form tampering, ensures cross-platform compatibility across all mobile and desktop PDF readers, and prevents signature loss when printing or emailing legal documents.
How to use Flatten PDF
- 1Select or drop your interactive PDF form or signed document.
- 2Review document details and page count.
- 3Click Flatten PDF.
- 4Download your secured, static flattened PDF instantly.
Frequently asked questions
- What does flattening a PDF mean?
- Flattening converts interactive elements (fillable form fields, checkboxes, signatures, and annotations) into permanent, non-editable graphics on the page layer.
- Why should I flatten my PDF?
- It ensures that values cannot be edited or erased, and prevents form entries from disappearing when opened in third-party viewers or sent to printers.
- Are my completed forms uploaded to a server?
- No. The flattening process runs 100% locally in your browser memory using WebAssembly. Confidential financial and legal form data never leaves your device.