Compression Result
Result appears here
Reduce PDF file size securely
Optimize your PDF documents to take up less space without losing visual quality, processed entirely in your browser.
How to use this tool
- 1
Choose a PDF
Upload the PDF document you want to compress.
- 2
Compress
Click the compress button to apply structural optimizations.
- 3
Download
Save the smaller PDF file to your device.
What it can do
Lossless optimization
Maintains exact visual quality without downsampling images or removing fonts.
Browser-based privacy
Your files never leave your device. All processing happens securely in your browser.
Fast processing
Optimize PDFs instantly without waiting for uploads or downloads from a server.
Useful for
- Reduce file sizes to fit within email attachment limits.
- Optimize PDFs so they load faster for visitors on your website.
- Keep smaller versions of your documents to free up disk space.
Limits to know
- Does not downsample images or compress fonts.
- Heavily image-based PDFs may not see significant size reduction with this method.
Private browser processing
This tool runs locally in your browser. TunerPage does not upload the working file or text to its servers.
Frequently asked questions
How does PDF compression work in the browser?
We use basic optimization techniques like removing unused objects and compressing metadata structure to reduce file size without quality loss.
Will my images be downsampled?
No, this basic browser-based compression does not downsample images or remove fonts, meaning the visual quality remains identical to the original.
Is my PDF uploaded to a server?
No. The compression process happens entirely locally in your web browser.
Why didn't my PDF get smaller?
If your PDF is already highly optimized or consists mostly of large compressed images, this structural optimization may not reduce its size further.