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Upload an image to display
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Online Image Compressor
Compress JPG / PNG / WebP images for free, reduce file size while keeping quality. All processing happens in your browser, images never leave your device.
Click or drop image
Supports JPG / PNG / WebP
All tasks run in your browser
Never uploaded · Privacy protected
Adjust settings to see result
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How to Compress Images
Upload Image
Click the upload area or drag an image in. Supports JPG, PNG, and WebP. Images stay in your browser, never uploaded to any server.
Adjust Quality
Drag the quality slider (default 80). Higher value means better quality and larger file. Above 80, the difference is virtually invisible.
Choose Format
Output format options: JPG, PNG, or WebP. WebP produces smaller files, JPG is great for photos, PNG is best for transparency.
Download Result
Preview the compression result and file size in real time. Click Download when satisfied. If the compressed file is larger, the original is kept.
Image Compression FAQ
Does the compressor upload images to a server?
No. ImgLab image compression runs entirely in your browser. Images are never uploaded to any server, ensuring zero privacy leakage.
Does compression reduce image quality?
At quality 80 or above, the difference is virtually invisible. If the compressed file is larger than the original, the system keeps the original automatically.
What image formats are supported?
JPG, PNG, and WebP are supported for compression, with one-click conversion to other formats.
Can I compress images in batch?
Yes. Use the batch tool to select multiple images, apply the same settings, and download the results as a zip file.
How much size reduction can I expect?
The result area shows the size before and after, plus the percentage saved. Photos can typically be reduced by 50%-80%, depending on the original quality and content.
Does it work on mobile?
Yes. The page is fully responsive, supports touch operations, and lets you compress images anywhere on your phone.