Choose PDF File
or drop a PDF file here
How to Compress PDF Files Online for Free
Large PDF files can be difficult to email, upload, or share. Our free online PDF compressor helps you reduce PDF file size while maintaining document quality. Compress your PDFs instantly without installing any software.
Why Compress PDF Files?
Email Attachments
Many email providers have file size limits (usually 25MB)
Faster Uploads
Smaller files upload and download much faster
Save Storage Space
Reduce storage requirements on your device or cloud
Improved Performance
Smaller PDFs open and load faster
Better Sharing
Easier to share through messaging apps and services
How to Compress a PDF
- 1Click "Choose PDF File" or drag and drop your PDF into the upload area
- 2Select your desired compression level (Basic, Medium, or High)
- 3Click "Compress PDF" to start the optimization process
- 4Wait a few seconds while your file is compressed
- 5Download your compressed PDF file immediately
- 6Compare the file sizes to see the reduction achieved
Basic Compression
Minimal compression with virtually no quality loss. Best for PDFs that need maximum quality (typically 10-20% smaller).
Medium Compression
Balanced approach that reduces file size significantly while maintaining good quality (typically 30-50% smaller).
High Compression
Maximum compression for smallest file size. Best for text-heavy documents (typically 50-70% smaller).
When to Compress PDFs
- •Before sending documents via email that exceed attachment size limits
- •When uploading PDFs to websites or online forms with file size restrictions
- •To save space in cloud storage (Google Drive, Dropbox, OneDrive)
- •Before sharing files through messaging apps with size limitations
- •When archiving old documents to free up storage space
- •To improve website loading speed for downloadable PDFs