Free PDF Compressor | Reduce File Size Online

PDF Compressor

Reduce PDF file size while maintaining quality. All processing happens locally in your browser for complete privacy and security.

Upload PDF File

Drop your PDF here or click to browse

Maximum file size: 25MB

filename.pdf

0 pages · 0 KB

Compression Settings

Select Compression Level

Low Compression

Best quality, moderate size reduction

Balanced

Recommended for most documents

High Compression

Smallest file size, reduced quality

Compressing PDF

Initializing...

0%

PDF compression completed successfully! Your file is ready for download.

Compression Results

Original Size

0 KB

Compressed Size

0 KB

0% smaller

How To Use The PDF Compressor

Simple steps to reduce your PDF file size

1

Upload Your PDF

Drag and drop or click to select a PDF file. Maximum supported size is 25MB.

2

Choose Compression Level

Select low, balanced, or high compression based on your quality and size requirements.

3

Click Compress

Start the compression process. Your file is processed entirely in your browser.

4

Review Results

Compare original and compressed file sizes to see your savings.

5

Download File

Save your compressed PDF instantly. No registration or payment required.

Frequently Asked Questions

Common questions about PDF compression

Yes, this PDF compressor is completely free with no hidden fees, file limits, or watermarks. You can compress unlimited PDFs without any cost or registration required.

Absolutely. All PDF compression happens directly in your browser using client-side JavaScript. Your files are never uploaded to any server, ensuring complete privacy and security of your documents.

For most documents, the Balanced option provides the best trade-off between file size and quality. Use Low Compression for high-quality prints or images, and High Compression when file size is the primary concern.

The tool supports PDF files up to 25MB in size. Larger files may cause performance issues due to browser memory limitations. For optimal performance, close other browser tabs when processing large documents.

Compression works by optimizing images within the PDF. Text and vector graphics remain crisp. With Low or Balanced compression, the quality difference is typically unnoticeable. High compression may show visible artifacts in detailed images.

Yes, the PDF compressor is fully responsive and works on all modern mobile browsers. The interface automatically adapts to your screen size for optimal usability on smartphones and tablets.

Currently, the tool cannot process password-protected or encrypted PDFs. Please remove any security restrictions from your PDF before attempting to compress it.

Your Privacy is Protected: All PDF compression is performed entirely inside your browser using client-side technology. No files are uploaded, stored, or transmitted to any external server. Your documents remain completely private and secure on your own device.

Compress PDF files instantly — secure, fast, and 100% client-side.