Back to Hub 📄 File Tool

PDF Compressor

Compress PDF files directly in your browser — choose resolution, quality, and target size. Completely private, nothing is uploaded to any server.

Drop your PDF here
or click to browse · PDF files only
Choose File
72%
Processing...
Original
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Compressed
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Saved
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How It Works
1Select or drop a PDF file (up to 100 MB).
2Choose a compression preset or set custom DPI and quality.
3Optionally set a target maximum file size.
4Click Compress and download your smaller PDF instantly.
Preset Reference
Screen72 DPIWeb / email sharing
eBook150 DPITablet & screen reading
Printer300 DPILaser / inkjet printing
Prepress600 DPIProfessional print
100% Private
✓Your file never leaves your device.
✓All processing happens inside your browser.
✓No server, no cloud, no account needed.
Quick Tips
💡Use Grayscale mode for text-heavy documents to save ~30% more.
💡72 DPI is perfect for WhatsApp / email sharing.
💡Set a target size to auto-reduce quality until it fits.
💡Image-heavy PDFs benefit most from compression.

Efficient and Secure PDF Compression

Managing large PDF documents can be difficult when dealing with email attachments or government portal uploads in Assam. Our PDF compressor online free tool allows you to reduce PDF size in KB directly in your browser, ensuring your documents remain sharp and readable while conforming to strict file size limits.

Our tool provides localized processing, meaning your sensitive documents like Aadhar cards, PAN cards, or educational certificates are processed entirely on your device. This makes it the most secure PDF compressor available, protecting your privacy while offering professional-grade resolution control and DPI settings.

  • Resolution Control: Adjust DPI from 72 (Screen) to 600 (High Quality) for the perfect result.
  • Advanced Options: Use Grayscale mode or target specific file sizes like 100KB or 500KB.
  • Privacy First: Your files never touch a server, making it faster and safer than cloud-based alternatives.
What is DPI in PDF compression?

DPI (Dots Per Inch) determines the clarity of images within the PDF. 72 DPI is great for web viewing, while 300 DPI is standard for high-quality printing. Lowering DPI is the most effective way to reduce PDF file size.

Will my PDF lose quality?

Compression involves a trade-off. However, our eBook preset is designed to significantly reduce size while keeping text and images perfectly readable on all digital devices.

Is there a file size limit?

No, our browser-based engine can handle large PDF files (up to 100MB+ depending on your device's RAM) without any subscription or registration requirements.