How does browser-based image compression work?

The tool draws your image onto an HTML Canvas element, then re-encodes it using the Canvas toBlob API at the quality level you choose. Lower quality means more aggressive lossy compression and smaller files.

Will compression reduce my image quality?

Yes, lossy compression discards some visual data. At 70-80% quality, the difference is usually imperceptible. Below 50%, artifacts like banding and blurring become noticeable, especially on gradients and text.

Is this tool free to use?

Yes. This tool runs entirely in your browser with no account required. Your data never leaves your device.

What is the maximum file size I can compress?

The tool accepts files up to 20 MB. Since processing happens in your browser, very large images may be slow on older devices. For best performance, keep images under 10 MB.

Does this work on mobile?

Yes. The tool is fully responsive and works on any device with a modern browser. You can select images from your camera roll or file manager.

Image Compressor

Compress JPEG, PNG, and WebP images directly in your browser.

Drop an image here or click to select

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About This Tool

Reduce image file size by adjusting quality and output format. Supports JPEG, PNG, and WebP inputs with WebP or JPEG output. See the original and compressed sizes side by side with a real-time preview. Everything runs locally in your browser using the Canvas API — your images never leave your device.

What you provide

An image file (JPEG, PNG, or WebP) and a quality percentage

What you get

A compressed image file with before/after size comparison

How to Use

Drop or select an image file (JPEG, PNG, or WebP, up to 20 MB).
Adjust the quality slider and choose the output format (WebP or JPEG).
Click Compress, review the size reduction, and download the result.

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Frequently Asked Questions

How does browser-based image compression work?: The tool draws your image onto an HTML Canvas element, then re-encodes it using the Canvas toBlob API at the quality level you choose. Lower quality means more aggressive lossy compression and smaller files.
Will compression reduce my image quality?: Yes, lossy compression discards some visual data. At 70-80% quality, the difference is usually imperceptible. Below 50%, artifacts like banding and blurring become noticeable, especially on gradients and text.
Is this tool free to use?: Yes. This tool runs entirely in your browser with no account required. Your data never leaves your device.
What is the maximum file size I can compress?: The tool accepts files up to 20 MB. Since processing happens in your browser, very large images may be slow on older devices. For best performance, keep images under 10 MB.
Does this work on mobile?: Yes. The tool is fully responsive and works on any device with a modern browser. You can select images from your camera roll or file manager.

Learn More

How Image Compression Works: Formats, Quality, and Performance

Learn how JPEG, WebP, and PNG compression work, what quality settings mean, and how image optimization impacts web performance and Core Web Vitals.

7 min read

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