Compress PDF + Change DPI (Optional)
Free online tool to reduce PDF file size with different compression levels and optionally adjust DPI (75–300).
Preview first page locally • Reorder • Compression levels • DPI control
Your PDFs (click thumbnail to zoom • drag to reorder • × to remove)
How to Compress PDF Online
Upload your PDF(s), choose compression level, optionally select DPI, and click the process button. The tool will compress and merge files if multiple.
Reduce PDF File Size
Choose from extreme compression (smallest size) to best quality. Lower DPI settings help reduce size further when needed.
Why Compress PDFs?
Smaller PDFs are easier to email, upload, and store, while still maintaining acceptable quality for most uses.
Free Online PDF Compressor with DPI Control
Compress PDF files quickly and securely. Choose compression strength and optionally adjust resolution from 75 to 300 DPI.
✔ Optional DPI change (75–300)
✔ Merge multiple PDFs
✔ Drag & drop reorder
✔ Files auto-deleted after 5 minutes
How to Use
- Upload one or more PDF files
- Select compression level
- Choose DPI if needed
- Reorder files if multiple
- Click Compress PDF
Frequently Asked Questions
How much can I reduce PDF size?
Depending on the original file and settings — often 50–90% reduction is possible with good quality.
Does changing DPI affect quality?
Yes — lower DPI reduces size but may affect print sharpness. 150 DPI is usually a good balance.
Is this PDF compressor free?
Yes, completely free, no signup. All files are automatically deleted from the server after 5 minutes for privacy.
100K+
Files Processed
Free
No Signup Required
5 Min
Auto File Deletion