Flatten PDF
Make form fields and comments part of the page so nobody can change them.
- 1Add files
- 2Adjust
- 3Download
Drop your PDF here
or choose a file from your device · PDF
Files open in this tab and are never uploaded.
How do I use Flatten PDF without uploading?
Open LocalPDF Flatten PDF, add your PDF, adjust the settings and click Flatten PDF. Everything runs in your browser, so your file is processed on your own device and never uploaded. It's free, needs no account and adds no watermark.
- 1
Add your PDF
Drag it onto the page or choose it from your device. It opens in this tab — nothing is uploaded.
- 2
Adjust the settings
Tweak the options in the settings panel, or keep the recommended defaults.
- 3
Flatten PDF
Processing runs on your device in seconds. Download the result or continue with another tool.
Flatten PDF FAQ
Guides
Why Is My PDF So Large? 6 Common Causes and Fixes
High-resolution images, embedded fonts, scans and hidden data make PDFs heavy. Find out what's inflating your file and how to shrink it safely.
10 November 2026
How to Sign a PDF for Free, Without an Account
Add your signature to a PDF in under a minute — type, draw or upload it, place it on the page and download. No sign-up, no watermark, nothing uploaded.
23 September 2026