How much can I compress a PDF without losing quality?

With our PDF compressor, you can typically reduce file size by 30-70% without noticeable quality loss. The compression depends on your PDF content - files with many high-resolution images compress more. Use Medium compression for best balance of quality and size reduction.

How does PDF compression work?

PDF compression optimizes images within the PDF, removes duplicate resources, and compresses content streams. Our tool uses PDF.js to analyze your PDF and apply intelligent compression that reduces file size while maintaining readability and visual quality.

Is there a file size limit?

The maximum file size is 20MB per PDF. Since all processing happens in your browser, very large files may take longer to process depending on your device performance. For best speed, we recommend PDFs under 10MB.

Are my PDF files uploaded to your servers?

No, absolutely not! All PDF compression happens entirely in your browser using JavaScript and PDF.js. Your files never leave your device, are never uploaded to any server, and are never stored anywhere. This ensures complete privacy and security.

Will compression affect PDF text or formatting?

No, compression primarily affects embedded images. Text, fonts, and document structure remain intact. The PDF will maintain its original formatting, links, bookmarks, and other features while reducing file size.

What compression level should I choose?

For most PDFs, Medium compression provides the best balance. Use High compression for documents requiring maximum quality (presentations, portfolios). Use Low compression for large PDFs where file size is critical (email attachments, web downloads).

PDF Compressor

Reduce PDF file size without quality loss

Upload PDF File

Click to upload or drag and drop

Supports: PDF files only

Maximum file size: 20MB

Compression Settings

Compression Level

High Quality

Best quality, minimal compression

Medium

Balanced quality & size (Recommended)

Maximum Compression

Smallest file size, good quality

Compression Result

Original Size

Compressed Size

Size Reduced

Your Privacy is Protected

All PDF compression happens directly in your browser using PDF.js library. Your files are never uploaded to any server, ensuring complete privacy and security. Your documents stay on your device throughout the entire process.

ToolEra