Free Online PDF Compressor
Reduce the file size of your large PDF documents without losing quality. Perfect for sending via email and uploading to the web.
Drag & drop your PDF here, or click to select
100% Private
Your files are never uploaded. All processing happens in your browser for maximum security.
Powerful Compression
Choose your level of compression to find the perfect balance between file size and quality.
Visibly Lossless
Our recommended compression setting significantly reduces file size with no visible loss in quality.
How to Reduce Your PDF's File Size
1
Upload Your PDF
Drag and drop your PDF file into the toolbox above, or click to select it from your device.
2
Choose Your Level
Select your desired compression level. "Recommended" is best for most uses, balancing size and quality.
3
Compress & Download
Click the "Compress PDF" button. Your new, smaller PDF will be ready for download in just a few seconds.
Frequently Asked Questions
Is it safe to compress a confidential document?
Yes, PDFsmith is the safest option. Because we process your file directly in your web browser, your document is never uploaded to an external server. Your data's privacy is fully guaranteed.
How much smaller will my file be?
The amount of compression depends on the content of your PDF. Files with many large images will see a significant reduction in size, while text-only documents may not shrink as much. Our tool always provides the best possible compression for your file.
Will compressing my PDF reduce the quality?
Our "Recommended" setting provides a great balance and is nearly lossless for most documents. The "Extreme Compression" option may slightly reduce the quality of high-resolution images to achieve the smallest possible file size, but text will remain perfectly clear.