Note:This tool provides basic compression (5–15% reduction) for text-based PDFs by optimising the file structure. Scanned or image-heavy PDFs won't shrink significantly — this is a browser limitation.
Drag & drop or browse
Max 50 MB per file
How to compress a PDF online
- 1
Click 'Browse' or drag your PDF into the upload area above.
- 2
Click the 'Compress PDF' button.
- 3
Your compressed PDF will download automatically.
Frequently Asked Questions
How much can I compress a PDF?
For text-based PDFs, expect 5–15% reduction. This tool re-saves the PDF structure more efficiently but does not re-compress images.
Is compression lossless?
Yes. The content and quality remain identical — only the internal file structure is optimised.
Why didn't my PDF get smaller?
If your PDF is already optimised, or mostly images, client-side compression will have minimal effect. Scanned PDFs won't shrink much without image recompression.
Are my files uploaded to your server?
No. All processing runs in your browser. Your files never leave your device.
Can I compress password-protected PDFs?
No. Please remove the password before compressing.