Flatten PDF Online Free

Make PDFs permanently non-editable by baking fields and annotations into the pages. Essential after redacting or filling forms.

Free forever · No watermark · No signup · Files never leave your device. Use it right below — the interactive tool loads with this page.

How to use Flatten PDF

When should I flatten?

Before sending contracts, redacted files, and completed forms — it locks everything into static pages.

Can I flatten many files?

Yes, batch mode flattens every uploaded file with one run.

Does flattening change appearance?

No. It preserves exactly how the file looks while removing editability.