Reduce file size with high quality. Everything runs locally in your browser — your files are never uploaded to a server, no registration is required, and the tool is completely free.
How to Compress PDF
Upload the PDF file you want to compress.
Select your preferred compression level — choose between balanced quality and maximum reduction.
Click "Compress" to process the file locally in your browser.
Download the smaller file and compare sizes with the original.
Features
Smart Compression Algorithm: Our engine uses image downsampling, font subsetting, and object stream optimization to reduce file sizes by up to 90%.
Quality Control: Choose between high-quality output for printing or aggressive compression for email attachments and web sharing.
No Visible Quality Loss: The compression algorithm intelligently identifies which elements can be reduced without affecting visual quality.
Ideal for Email Attachments: Compress large reports and presentations to fit within email attachment size limits while maintaining readability.
Frequently asked questions
How much can the file size be reduced?
Results vary based on content. PDFs with many high-resolution images can be reduced by 70-90%. Text-heavy PDFs with few images typically see 20-40% reduction.
Will compression affect text clarity?
No. Text elements are compressed using lossless methods, so characters, fonts, and readability remain perfectly intact.
Can I compress a PDF multiple times?
You can, but subsequent compressions yield diminishing returns. The first compression captures the largest gains.
What makes local compression safer than cloud services?
Your sensitive financial reports, contracts, and personal documents never leave your device. Cloud compression services require uploading your files to their servers, which introduces security and privacy risks.