Compress PDF Files Online
Reduce PDF file size without losing quality. Our free online tool helps you shrink large PDFs for email, web, or storage.
Drag & drop your PDF file here
or
Supports: PDF (Max: 25MB)
Compression Results
Original File
Compressed File
Why Use Our PDF Compressor?
Secure Processing
Your files never leave your browser. We don't upload or store your documents on any server.
Fast Compression
Our optimized algorithm compresses PDFs in seconds, even for large documents.
Adjustable Settings
Choose between different compression levels to balance quality and file size.
How to Reduce PDF File Size Without Losing Quality
PDF compression is essential when you need to send documents via email, upload them to websites with size limits, or simply save storage space. Our online PDF compressor makes this process quick and easy while preserving document quality.
Understanding PDF Compression
PDF files can become large for several reasons:
- High-resolution images: Embedded photos and graphics consume the most space
- Embedded fonts: Documents with custom fonts tend to be larger
- Document structure: Complex layouts with many elements increase file size
- Uncompressed content: Some PDFs aren't optimized during creation
Best Practices for PDF Compression
- Choose the right compression level: Medium compression usually offers the best balance between quality and size
- Compress images separately: For documents with many images, consider the "Compress Images Only" option
- Check the results: Always preview compressed PDFs to ensure text remains readable
- Split large documents: For files over 25MB, consider splitting into parts before compression
Common Use Cases
Our users compress PDFs for various purposes:
- Email attachments: Many email providers limit attachments to 10-25MB
- Website uploads: Online forms often have strict file size limits
- Mobile viewing: Smaller files load faster on phones and tablets
- Archiving: Reduce storage needs for document archives
- Academic submissions: Meet university or journal file size requirements
The compression process maintains all text and vector graphics at full quality while optimizing images and document structure. For best results, we recommend using the Medium compression setting for most documents.
