All tools / Compress PDF
Make a PDF smaller
Shrink a PDF so it fits an email or an upload form. Keep your text selectable, or squeeze it down to a size you set.
How to compress PDF
- Choose your PDF.
- Pick Keep text, or Smallest file and set a target size if you need one.
- Select Compress PDF and compare the new size.
Your file never leaves this tab.
Compress PDF runs as code inside your browser. The document is read from your device, changed in memory, and handed back to you as a download. There is no upload step and no copy on our servers.
That also means it keeps working on a plane or a slow connection once the page has loaded.
Check it yourself
- Open your browser developer tools and go to the Network tab.
- Use the tool on a file.
- You will see no request carrying your file anywhere.
Questions about Compress PDF
What is the difference between Keep text and Smallest file?
Keep text rewrites the file more efficiently and leaves text, links and fonts alone, so savings are modest. Smallest file turns each page into an image, which can shrink a PDF dramatically, but the text can no longer be selected or searched.
How does the target size work?
In Smallest file mode, the tool tests lower image quality and resolution until the result fits under your target. If a target is too low for the page count, it gets as close as it can and tells you.
Will my PDF look worse?
Keep text does not change how pages look. Smallest file lowers image sharpness. For documents you will print, try a larger target first.
Are my files sent to a server?
No. Compression is done in your browser, so confidential documents stay on your device.
About compress pdf Tool
The compress pdf tool at Kyvorix is built to run 100% in your browser. Your file is read locally, processed in memory and returned as a download. No upload, no storage on our servers, works offline.
Free to use, no sign-up, no watermark. Perfect for students, offices and anyone who needs quick PDF jobs without risking privacy.
Benefits
- Private: file never leaves your device
- Fast: no queue, instant processing
- Free: no limits, no account needed
Frequently Asked Questions
Is this tool free?
Yes, 100% free, supported by ads.
Do you upload my file?
No, everything runs in your browser offline.
Works on phone?
Yes, Chrome, Safari, Firefox on mobile and desktop.