How does image compression work?

The tool uses your browser's Canvas API to re-encode the image at progressively lower quality levels using a binary search algorithm, until the output matches your target file size as closely as possible.

Is my image uploaded to any server?

No. All compression happens entirely in your browser. Your images never leave your device.

What image formats are supported?

You can upload JPEG, PNG, and WebP images. The compressed output is always JPEG for maximum size reduction.

Compress Image to KB

Compress images to a specific file size in KB. Reduce JPEG, PNG, WebP images online for free. No upload to server — runs entirely in your browser.

✓ Free • No Signup • Client-Side Only

Image Compressor

Upload an image and compress it to your desired file size in KB. The tool uses a smart binary search algorithm to find the optimal JPEG quality. All processing runs in your browser — your images never leave your device.

Drag & drop your image here

or click to browse • JPEG, PNG, WebP • Max 50MB

Original Size

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Compressed Size

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Reduction

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Dimensions

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Quality Used

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Format

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Original

Compressed

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Compress Image to KB

Image Compressor

Original

Compressed

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