Choose a file to convert. It's processed locally — never uploaded. Tip: add several files to convert them all at once.
Result appears here after you select
{ } How it works
Flatten PDF works on the file you upload. Select Process ▸ and it runs entirely in your browser — nothing is uploaded to a server — then shows the result in the Output panel.
Input
- PDF file — upload a file (.pdf); it is read locally in your browser
Output
A downloadable PDF file — use the Download button in the Output panel.
{ } Common uses
- Lock in filled-form values before sharing.
- Make a form display and print consistently everywhere.
{ } Limitations
- Flattens AcroForm form fields; it does not merge external annotations or permanently redact content.
- If the PDF has no form fields, it is simply re-saved unchanged.
- Flattening is one-way — keep your editable original.
{ } FAQ
Is my data uploaded to a server?
No. Everything runs locally in your browser — your files never leave your device.
Can I process more than one file at once?
Yes — add several files and they’re all processed and downloaded together as a ZIP.
Is this tool free?
Yes — it’s completely free and needs no sign-up.
Is flattening the same as redacting?
No. Flattening removes form interactivity; it does not remove or hide underlying text or images.