Compress PDF
Reduce your PDF file size while maintaining the best possible quality.
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Compress PDF — Reduce File Size Without Losing Quality
Large PDF files can be a problem — they take too long to email, eat up cloud storage, and are slow to download on mobile connections. Our PDF compressor reduces file size by optimizing the internal structure of your PDF using object streams and efficient encoding.
The compression works by re-serializing the PDF with optimized internal data structures. Object streams consolidate multiple small objects into larger, more efficiently stored containers. This typically reduces file size by 5-30% depending on how the original PDF was created.
Unlike lossy compression that degrades image quality, our structural optimization preserves every pixel of every image, every character of text, and every vector graphic at full quality. The file simply takes up less space because the data is organized more efficiently.
This tool is ideal for professionals who need to email PDFs within attachment size limits, teams using shared cloud storage who want to minimize space usage, website owners serving PDFs for download, and anyone who needs to reduce file sizes for faster uploading and downloading.
How It Works
Upload Your PDF
Select the PDF file you want to compress. Any standard PDF file is supported.
Optimize Structure
Our engine re-serializes the PDF using object streams for more efficient data storage.
Download Compressed File
Get your optimized PDF with the same visual quality at a reduced file size.
Why Use Our Tool?
Lossless Compression
File size is reduced by optimizing internal data structures — no quality loss whatsoever.
Instant Results
Compression takes just seconds, even for multi-page documents.
Original Quality Preserved
Every image, font, and vector graphic remains at full original quality.
Significant Size Reduction
Typical reductions of 5-30% depending on original file structure and content.
No Watermarks
Your compressed PDF is clean — we don't add any branding or watermarks.
Unlimited Compressions
Compress as many files as you need with no daily limits or restrictions.