PDF Compressor

Reduce PDF file size without losing quality. Compress large PDF files to save storage space and improve sharing speed.

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Select a PDF file to compress and reduce its file size

Why use PDF Compressor?

Large PDF files can be problematic for sharing, storage, and email attachments. Whether you're dealing with scanned documents, image-heavy reports, or complex presentations, file size often becomes a barrier to efficient document management. Our PDF Compressor provides a professional solution that reduces file size while maintaining quality, all working entirely in your browser to ensure your documents remain private and secure.

Email size limits, cloud storage constraints, and slow upload/download speeds make PDF compression essential for modern document workflows. Traditional compression methods often require expensive software or online services that upload your files to their servers, creating privacy concerns and potential security risks. Our tool eliminates these concerns by processing everything locally on your computer using advanced client-side PDF optimization technology.

The tool offers multiple compression levels to suit different needs. Low compression maintains maximum quality while still reducing file size, perfect for documents where visual fidelity is critical. Medium compression provides a good balance between file size reduction and quality preservation, ideal for most use cases. High compression significantly reduces file size while maintaining acceptable quality, suitable for documents that will be viewed on screen. Aggressive compression maximizes file size reduction, which may slightly reduce quality but is perfect for documents that need to be as small as possible.

What sets our PDF Compressor apart is the complete privacy and security it offers. Unlike cloud-based compression services that require you to upload your PDFs to their servers, our tool processes everything in your browser. Your PDF files never leave your computer, never get transmitted over the internet, and we cannot access or view any of your documents. This is especially important for legal professionals, healthcare workers, financial advisors, and anyone handling sensitive information.

🔒Privacy & Security

Zero Data Logging: Your data is processed 100% locally in your browser and never sent to our servers.

All processing happens client-side using advanced web technologies. Your files, data, and personal information remain completely private and secure. We don't store, log, or transmit any of your information. Once you close the browser tab, all data is cleared from memory.

💡Pro Tips & Advanced Use Cases

  • Compress scanned documents before emailing. Reduce file size by 50-80% while maintaining readability, perfect for sharing via email.

  • Optimize PDFs for web hosting. Smaller files load faster on websites, improving user experience and reducing bandwidth costs.

  • Use different compression levels for different purposes. Low for archiving, Medium for general use, High for screen viewing, Aggressive for maximum space savings.

  • Compress image-heavy PDFs for better performance. Reports with many images can be significantly reduced without noticeable quality loss.

  • Prepare PDFs for mobile sharing. Compressed files are easier to share via messaging apps and consume less mobile data.

  • Reduce storage costs by compressing archived documents. Save space on cloud storage and local drives without losing important information.

Frequently Asked Questions

Is my PDF file secure during compression?

Absolutely. All PDF compression happens entirely in your browser using client-side JavaScript. Your PDF file never leaves your device, never gets uploaded to our servers, and we cannot see or access any of your documents. This ensures complete privacy and security.

Will compression reduce the quality of my PDF?

The compression level you choose determines the quality impact. Low and Medium compression maintain high quality while reducing file size. High compression may slightly reduce quality but remains suitable for most documents. Aggressive compression maximizes size reduction but may have more noticeable quality changes.

How much can I reduce the file size?

Compression results vary depending on your PDF content. Scanned documents and image-heavy PDFs typically see 50-80% size reduction. Text-based PDFs may see 20-40% reduction. The tool shows the compression ratio after processing, so you can see exactly how much space you saved.

Can I compress PDFs multiple times?

Yes, but additional compression after the first pass typically yields minimal size reduction. The first compression is usually the most effective. For best results, compress once with your desired quality level.

Related Tools

Explore more PDF Tools that might help with your workflow:

BolehTools

BolehTools is a comprehensive, free online platform offering professional-grade utilities for PDF manipulation, image processing, and JSON formatting. Our browser-based tools process all files locally on your device - ensuring complete privacy, security, and data protection. No account registration, no file uploads to servers, no hidden fees. Perfect for professionals, students, developers, and anyone who needs reliable document and image processing tools. All tools are 100% free, work instantly in your browser, and support batch processing for maximum productivity. Made with care in Malaysia for users worldwide.

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🔒 Security & Privacy: Client-side only. Your data is not stored or sent to our servers. All processing happens locally in your browser.

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Last updated: January 17, 2026

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