PDF Compressor
Reduce PDF file size while maintaining quality
How It Works
Upload PDFs
Click or drag & drop your PDF files
Choose Level
Select compression level (low to extreme)
Compress
Click compress to optimize your PDFs
Download
Download your compressed PDFs
Key Features
Multiple Compression Levels
Choose from 4 compression levels to balance quality and file size
Batch Processing
Compress multiple PDF files at once
100% Secure & Private
All processing happens locally in your browser
Visual Feedback
See compression ratio and space saved for each file
Why Compress PDF Files?
PDF compression reduces file size by optimizing internal data structures and removing redundant information. Smaller PDFs are easier to email, upload, store, and share, while still maintaining readable quality for most purposes.
Our PDF compressor uses advanced optimization techniques to reduce file size without significant quality loss. You can choose from multiple compression levels depending on your needs - from light compression that maintains maximum quality to extreme compression that prioritizes the smallest possible file size. The tool works entirely in your browser using pdf-lib, ensuring your files remain completely private.
Common Use Cases
Email Attachments
Reduce PDF size to meet email attachment limits. Most email providers have 10-25MB limits, and compression helps you stay within those bounds.
Web Upload Forms
Many online forms and applications have strict file size limits. Compress your documents to ensure they upload successfully.
Storage Optimization
Save disk space on your computer, cloud storage, or server by compressing archived documents and files you need to keep but don't access frequently.
Frequently Asked Questions
Will compression affect PDF quality?
Low and medium compression levels maintain very good quality suitable for most uses. High and extreme compression will reduce quality more noticeably but are useful when file size is the priority. For best results, start with medium compression.
How much smaller will my PDF be?
Results vary based on the original PDF content and compression level. PDFs with many images typically see 30-70% size reduction, while text-heavy PDFs may see 15-30% reduction. The tool shows exact compression ratios after processing.
Is my data safe?
Absolutely! All compression happens entirely in your browser. Your PDFs are never uploaded to any server, ensuring complete privacy and security.
Can I compress password-protected PDFs?
No, password-protected PDFs must be unlocked before compression. You'll need to remove the password protection using the original password first.