Flatten PDF
Bake form fields and annotations into the page so it looks the same everywhere and can't be edited.
Drop a PDF here
Everything happens on your device — your files are never uploaded.
Form fields and stamps become permanent page content. The file looks identical everywhere and can no longer be edited.
Done
How it works
- 1 Drop your PDF or pick it.
- 2 Click Flatten PDF. Form fields and annotations merge into the page.
- 3 Download the flattened, non-editable file.
Built with open source
- pdf-lib — Creates and modifies PDF documents. · MIT
Frequently asked
What does flattening a PDF do? +
It merges the interactive layers (form fields, checkboxes, dropdowns, stamps) into the static page. The values stay visible but turn into permanent content, so no one can change them and the file renders the same in every viewer.
Will my filled-in answers stay? +
Yes. Whatever is in the form right now gets baked into the page exactly as shown, then locked.
What if the PDF has no form? +
It still works. A PDF with no fillable fields passes through unchanged. Everything runs in your browser and the file never leaves your device.