PDF Compressor
Compress your PDF files instantly with our free online PDF Compressor. Reduce file size while maintaining document quality — perfect for email attachments, web uploads, and storage optimization. The tool processes everything locally in your browser for complete privacy.
What Is
The PDF Compressor is an online tool that reduces the file size of PDF documents by optimizing images, removing redundant data, and applying efficient compression algorithms. It supports multiple compression levels from light compression (minimal quality loss) to maximum compression (smallest file size). The tool handles text-heavy documents, image-rich PDFs, and mixed content files. All compression is performed client-side using JavaScript, ensuring your documents never leave your device.
How to Use
- Open the PDF Compressor in your browser — no installation or registration needed.
- Upload your PDF file by dragging and dropping it onto the upload area or click to browse.
- Select your desired compression level: Light, Medium, or Maximum.
- Click the 'Compress PDF' button to start the compression process.
- Wait for the progress indicator to complete — compression typically takes a few seconds.
- Download your compressed PDF file and compare the size reduction.
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Frequently Asked Questions
Is the PDF Compressor free to use?
Yes, this tool is completely free with no usage limits. You can compress unlimited PDF files of any size. All processing happens locally in your browser.
Will compression reduce my PDF quality?
Light compression preserves near-original quality. Medium compression offers a good balance between size and quality. Maximum compression reduces quality more noticeably but produces the smallest files.
Is my document kept private?
Absolutely. All compression is performed locally in your browser using JavaScript. No file data is transmitted to any server, making it safe for confidential documents.
What is the maximum file size I can compress?
The tool can process files of any size limited by your browser's available memory. For files over 50MB, processing may take longer.
What compression levels are available?
Three levels are available: Light (10-20% size reduction, minimal quality loss), Medium (30-50% size reduction, acceptable quality), and Maximum (50-70% size reduction, noticeable quality loss on images).