Compress PDF to 100KB Online
Reduce a PDF to 100KB or less for the strictest upload limits. Works on scanned documents and certificates, privately in your browser.
Files are processed in your browser and never uploaded.
Files are processed on your device and never leave it.
No upload wait, results appear right in your browser.
No sign up, no watermark and no limits.
How to use Compress PDF to 100KB
100KB is a tight limit, so scanned pages are often turned into optimized images to fit. Short documents and single page certificates work best.
- Click the box or drop your PDF.
- The tool tries the lightest compression first and goes stronger only if needed.
- Wait while each page is optimized in your browser.
- Download the PDF under the target size.
Frequently Asked Questions
Is this Compress PDF to 100KB free?
Yes. Compress PDF to 100KB is completely free, with no sign up, no watermark and no daily limit.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files are never uploaded, stored or seen by anyone.
Does it work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.