Compress PDF
Reduce PDF file size while maintaining quality. Free, private — works entirely in your browser.
Drop a PDF file here
or click to browse
How to Compress a PDF
Our PDF compressor rebuilds your document to reduce file size. It optimizes the internal structure of the PDF while preserving all content.
How It Works
1. Upload: Drag and drop or select your PDF file.
2. Compress: Click the compress button to start optimization.
3. Download: Get your smaller PDF immediately.
Privacy
All compression happens locally in your browser. Your files are never uploaded to any server.
How to Use This Tool
Upload Your PDF
Drag and drop or click to select the PDF file you want to compress.
Compress
Click the compress button. The tool optimizes the internal PDF structure to reduce file size.
Download
Download your compressed PDF and see the file size reduction percentage.
Key Features
Significant Size Reduction
Reduce PDF file size by optimizing internal structure, removing duplicates, and streamlining content.
Quality Preserved
Text, vectors, and formatting remain sharp. Image quality is maintained at optimal levels.
Offline Processing
Your files stay on your device. No uploads to external servers.
Instant Results
See compressed file size immediately with before/after comparison.
Common Use Cases
- Reducing PDF size for email attachments (under 25MB limit)
- Compressing large reports for faster upload to cloud storage
- Optimizing PDFs for web publishing and faster page loading
- Shrinking scanned documents that are unnecessarily large
Frequently Asked Questions
How much can I reduce the file size?
Compression results vary depending on the PDF content. Typically, you can expect 20-70% reduction. PDFs with lots of images see the biggest savings.
Will compression affect the text quality?
No. Text, fonts, and vector graphics are preserved perfectly. Only redundant internal data is removed.
Can I compress encrypted PDFs?
If the PDF can be opened in your browser, it can be compressed. Password-protected files that require a password to view may need the password first.
Is there a file size limit?
There's no hard limit, but very large files (100MB+) may take longer to process depending on your device. We recommend files under 100MB for best performance.
Why is my compressed file sometimes larger?
In rare cases, if a PDF is already highly optimized, the re-encoding process may add minimal overhead. This is normal for already-compressed files.