FileToolsPro

Compress PDF File Size

How to Compress PDF Files Online

Our free online PDF compressor reduces your PDF file size in seconds. Simply upload your PDF, choose the compression quality, and download the smaller file. All processing happens in your browser — your files are never uploaded to any server, keeping them 100% private and secure.

Frequently Asked Questions

Is this PDF compressor free?
Yes, it is completely free with no limits. No signup, no watermark, no hidden charges.
How much can I reduce the PDF size?
You can reduce PDF size by up to 80% depending on the content. Image-heavy PDFs compress the most.
Is my file safe?
Absolutely. Your PDF is processed entirely in your browser. No file is ever uploaded to a server.
What is the maximum file size I can compress?
There is no hard limit since everything runs in your browser. However, very large PDFs (100MB+) may be slow depending on your device.
Does compression reduce PDF quality?
You can control the quality using the slider. Higher quality means larger file size. For most documents, 50-60% quality gives the best balance.