Is my image uploaded to a server?

No. Compression uses your browser's Canvas API. Images never leave your device, which makes this safe even for sensitive photos.

Why is the file size sometimes larger after compression?

Already-optimized images (e.g., from social networks) can't compress further without visible quality loss. The tool warns you when this happens.

What output format does it use?

WebP for maximum compression with good quality. Most modern browsers support WebP. If you need JPG/PNG output, use a different tool.

What's the maximum file size I can compress?

Up to approximately 20 MB. Very large images may be slow to process depending on your device's GPU.

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Image Compressor

Compress JPG, PNG, and WebP images in your browser — no upload needed.

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About this tool

Drag in any image and choose a quality level. Compression runs entirely in your browser using the Canvas API and WebP encoding, so your photos never leave your device.

How to use

1 Drag and drop an image onto the tool, or click to browse and select a file.
2 Adjust the quality slider (lower = smaller file, more compression).
3 Preview the compressed image and compare file sizes side by side.
4 Click Download to save the compressed image.

Frequently Asked Questions

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