How much can I compress an image?

Depending on the original image and quality setting, you can typically reduce file sizes by 40–90%. A 3MB JPEG compressed at 80% quality often results in a file under 400KB with no visible quality loss.

Is my image uploaded to a server?

No. All compression happens entirely in your browser using JavaScript. Your images never leave your device, making this tool 100% private.

What image formats are supported?

JPEG, PNG, and WebP are fully supported. The output is always in JPEG format for maximum compression efficiency.

Does reducing quality affect image appearance?

At 70–85% quality, the difference is imperceptible to the human eye in most photos. For graphics or text-heavy images, use 85–95%.

Is there a file size limit?

There is no strict server-side limit since everything runs in your browser. Very large files (20MB+) may take a few seconds to process.

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Free Online Image Compressor

Compress JPEG, PNG, and WebP images by up to 90% free, instantly in your browser. No upload, no sign-up. Browser-based image optimizer.

About this tool

Compress JPEG, PNG, and WebP images online for free — no uploads required. Our browser-based image compressor reduces file sizes by up to 90% while preserving visual quality. Perfect for web developers, designers, and anyone looking to shrink image file sizes fast.

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Drop an image here or click to browse

Supports JPEG, PNG, WebP · Max 20MB