Optimize PDF
How to Compress a PDF and Reduce File Size
Is your PDF too big to email or upload? Filenik compresses it for free in your browser and keeps it private. It is especially effective on scanned or image heavy PDFs.
Step by step
- Open the Compress PDF tool and upload your PDF.
- Choose a level: Extreme for the smallest file, Recommended for a balance, or Less for the best quality.
- Click Compress. Filenik shows you the new file size and how much smaller it is.
- Download your compressed PDF.
Pro tips
- Need an exact size like 100KB? See our guide on compressing a PDF to a specific size.
- Removing extra pages first is one of the fastest ways to cut size.
Why use Filenik
Filenik is free with no watermark, and your document is compressed on your own device rather than on a server. That makes it a private way to shrink sensitive files.
Frequently asked questions
Will compression lower the quality?
Higher compression trades some image sharpness for a smaller size. The Recommended level keeps a good balance.
Do you upload my file?
No. The PDF is compressed locally in your browser.
Why did my file barely get smaller?
PDFs that are mostly text are already small. Compression helps most on scans and image heavy files.
Can I compress to an exact size?
Use the Extreme level and remove extra pages. See our compress to a specific size guide for tighter limits.