JPG/PNG Image Compressor
Compress JPG and PNG images 100% locally in your browser using HTML5 Canvas with zero server uploads.
Click to upload JPG or PNG image
Supports PNG, JPG, and WebP formats. 100% client-side.
Fast Local Client-Side Image Compression
Reduce image file sizes for websites, applications, and documents without compromising privacy or image quality.
1. HTML5 Canvas Processing
Images are re-encoded directly within your browser GPU/CPU using native Web Canvas APIs.
2. Adjustable Compression Ratio
Fine-tune the compression slider to get the optimal balance between image clarity and file size reduction.
3. 100% Private & Secure
Your sensitive photos and graphics are never uploaded over the network to any third-party server.
About the Image Compressor
The Image Compressor reduces the file size of JPG, PNG and WebP images using the browser canvas and codec APIs, so pictures never leave your device. Adjust the quality setting and compare the resulting size against the original before downloading. Because there is no upload step, it is appropriate for screenshots containing internal dashboards or customer data that should not pass through a third-party service.
How to use the Image Compressor
- Drag an image onto the drop zone or browse for a file.
- Adjust the quality slider and compare the original and compressed sizes.
- Download the optimised image.
Frequently asked questions
Are my images uploaded to a server?
No. Compression uses the browser canvas and encoding APIs, so the file is read from disk into your tab and never sent anywhere. The tool continues to work with your network disconnected.
Will compression reduce image quality?
JPEG and WebP compression is lossy, so some detail is discarded. In practice the 70 to 85 percent quality range cuts file size dramatically with differences that are hard to see at normal viewing size.
Should I use WebP instead of JPG or PNG?
WebP typically produces files 25 to 35 percent smaller at equivalent quality and supports transparency, and every current browser supports it. Keep a JPG or PNG fallback only if you must support very old clients.
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Image Compressor is free to use with no account, no ads and no usage limits. Every calculation runs locally in your browser, so nothing you paste is ever uploaded. See our privacy policy.