Compress PDF
Reduce PDF file size without losing quality. 100% free, runs in your browser.
How to use Compress PDF
Using Compress PDF is quick and simple. Upload your file using the upload zone above — drag and drop it directly or click to browse your files. The tool works entirely in your browser, so your files never leave your device and nothing is uploaded to any server. Once you have your file loaded, adjust the settings to your preference and click the process button. Your result will be ready to download in seconds. All processing happens client-side using modern browser APIs, ensuring complete privacy and fast performance even for large files.
Frequently Asked Questions
How much can PDF compression reduce file size? +
Typically 20–80% depending on the PDF content. PDFs with many embedded images compress the most. Text-heavy PDFs see smaller reductions.
Will compression affect PDF quality? +
At eBook quality (our default), you will not notice any difference for normal use. Screen quality is suitable for on-screen reading. Print quality maintains high resolution.
Is there a file size limit? +
No. Because processing happens entirely in your browser, there is no server upload limit. Very large PDFs may take longer to process.
Are my PDF files kept private? +
Yes, completely. Your file never leaves your browser. The compression happens using JavaScript running on your own device.
What compression level should I use? +
Use Screen for sharing via email. Use eBook for general web use. Use Print when you need to send to a printer.
Your files never leave your device. All processing happens in your browser. No data is sent to any server.