Compress PDF online, privately.
Compress PDF in seconds — processed in your browser, so your files never leave your device.
In short
Compress PDF lets you compress a PDF directly in your web browser. CorePDF performs the operation locally — your documents are never uploaded to a server — and exports a clean PDF you can download instantly.
Private by default
Most online PDF tools upload your file to their servers. CorePDF runs entirely in your browser, so sensitive documents stay on your device.
- No uploads — fully in-browser
- Fast, with no watermark on your content
- Works on any device
- Part of a full PDF toolkit
How it works
- 1
Add your file
Drop in a PDF or images.
- 2
Compress PDF
Use the editor to compress as needed.
- 3
Download
Export your finished PDF instantly.
Frequently asked questions
How do I compress a PDF?+
Open CorePDF, add your file, compress it in the editor, and download — all in your browser.
Are my files uploaded?+
No. CorePDF processes everything locally in your browser, so files never leave your device.
Is it free?+
Yes — core PDF operations are free with generous daily limits.
Compress PDF now
Start free — no credit card required. Replace a stack of subscriptions with CorePath.