How to Compress an Image Online
Image compression reduces file size while keeping visual quality acceptable. Drop your images above, set the quality level, and click Compress. All processing happens in your browser β nothing is sent to any server.
Lower quality settings (50β70%) work well for web thumbnails and social media previews. Higher settings (80β90%) are better for photos where detail matters.
When Should You Compress Images?
- Before uploading to a website or online store β large images slow down page load
- Before sending by email or messaging app β many services have attachment size limits
- Before uploading to Instagram, Twitter, or other platforms
- To save storage space on your phone or computer
Quality vs. File Size Reference
| Quality Setting | Typical Size Reduction | Best For |
|---|---|---|
| 90β100% | 10β30% | Print, archiving |
| 75β85% | 40β60% | Web photos, e-commerce |
| 60β75% | 60β75% | Thumbnails, previews |
| Below 60% | 75%+ | Small icons, tiny previews |
Frequently Asked Questions
Does compressing an image reduce quality?
Yes, but the change is usually invisible at quality settings above 70%. The tool lets you preview the result before downloading so you can find the best balance.
Is my image uploaded to a server?
No. All processing is done entirely inside your web browser using JavaScript. Your images never leave your device and are not stored anywhere.
What image formats are supported?
JPG, PNG, and WebP. The compressed output is saved as JPG for maximum compatibility and smallest file size.
Can I compress multiple images at once?
Yes. Select or drop multiple files and they will all be processed together. Each file gets its own download button.