Compress PDFs the smart way—right in your browser. Our free, no-install tool instantly reduces
file size while maintaining quality. Nothing uploads, nothing leaves your device.
Add up to 20 PDFs from your computer, or simply drag & drop them into the box.
Watch the compression happen automatically, then download your smaller files.
Drop Your PDFs Here
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Free PDF Compressor Tool
Looking for a quick way to compress PDF files online? This free PDF compressor reduces file size
while maintaining quality — directly in your browser, with no uploads, no watermarks, and no cost.
Why compress PDF files online?
Reduce file size for easier emailing and sharing.
Save storage space on your device or cloud storage.
Faster uploads and downloads for web pages and forms.
How to compress PDF files
Click Upload files or drag & drop up to 20 PDFs.
Watch as files are automatically compressed with smart quality optimization.
Click Compress All to process all files at once.
Click Download All to save your compressed PDF files.
Our online PDF compressor is secure, free, and works on Windows, macOS, Linux, and mobile devices.
Files never leave your device, so your privacy is protected.
Frequently Asked Questions about Compressing PDFs
Is this PDF compressor really free?
Yes — this free PDF compressor lets you reduce PDF file size online without paying a cent.
There are no hidden costs, watermarks, or trial limits.
Are my files uploaded to a server?
No. The compression process happens entirely in your browser using modern web technologies.
Your PDFs stay on your device and are never uploaded, stored, or shared with anyone.
What file types can I compress?
You can compress PDF files only. The tool automatically detects and processes
PDF documents with smart quality optimization.
How much can I reduce the file size?
Compression results vary by file content, but typically you can expect 30-70% size reduction
while maintaining good visual quality. Text-heavy PDFs compress better than image-heavy ones.
Will the quality be affected?
Our smart compression algorithm balances file size reduction with quality preservation.
The result maintains readability while significantly reducing file size.