Compress Images Online
Reduce file sizes by up to 90% while keeping your images looking great. 100% free, 100% private.
Drop images here
or browse files — PNG, JPG, WebP supported
How to Compress Images Online
Compressing images reduces their file size, making them faster to load on websites, easier to share via email, and more efficient to store. SmarterSources's image compressor uses advanced browser-based algorithms to shrink your images while preserving visual quality.
How It Works
Drag and drop your images into the tool above, adjust the quality slider to find the right balance between file size and visual quality, and click compress. The tool uses the HTML5 Canvas API and modern image encoding to re-encode your images at a lower file size. WebP format typically offers the best compression ratios — often 25-35% smaller than equivalent JPEGs.
Tips for Best Results
For photographs, a quality setting of 75-85% typically reduces file size by 50-70% with minimal visible quality loss. For screenshots and graphics with text, PNG format preserves sharpness better but with larger file sizes. WebP is the best all-around format, offering both lossy and lossless compression with excellent results.
Privacy Guarantee
SmarterSources compresses your images entirely within your browser. No files are uploaded to any server. Your images never leave your device, making this the most private image compression tool available online.
Frequently Asked Questions
Will compressing my image reduce its quality?
Some quality loss is inherent in lossy compression (JPG, WebP), but at 75-85% quality, the difference is virtually imperceptible to the human eye. The quality slider gives you full control over the tradeoff between file size and visual quality.
What's the best format for web images?
WebP offers the best balance of quality and file size for most web use cases. It's supported by all modern browsers and typically produces files 25-35% smaller than JPEG at equivalent quality. If you need transparency, use WebP or PNG.
Can I compress multiple images at once?
Yes! Simply drag and drop multiple images or use the file picker to select multiple files. Each image will be compressed with the same settings and you can download them individually or as a batch.
What's the maximum file size I can compress?
There's no artificial limit. Since processing happens in your browser, the only constraint is your device's available memory. Most devices can handle images up to 50-100MB without issues.