Compress images online
Large image files make web pages slow and consume storage space. With this tool you compress JPEG, PNG and WebP images directly in the browser. Choose compression level and download optimized images in seconds.
How to do it
- Upload the images you want to compress by dragging and dropping.
- Choose compression level: Low (best quality), Medium (balanced) or High (smallest file size).
- Click "Compress" and download the optimized images individually or as ZIP.
All processing happens locally in your browser — your images never leave your computer.
Why compress images?
Image optimization is one of the most important measures for web performance. Images typically account for 50-75% of a web page's total weight. By compressing them you can halve loading time without the visitor noticing any difference in image quality. Google uses page loading speed as a ranking factor in search results. The Lighthouse tool, provided by Google, recommends that images should be optimized. With proper compression you can save hundreds of kilobytes per image without visible artifacts. The tool offers three levels: Low compression preserves high quality and suits print or portfolio. Medium provides a good balance for most web pages. High compression minimizes file size and suits thumbnails or background images. The entire process happens locally in your browser using the Canvas API. Images are never uploaded to any server, meaning you can safely compress even sensitive images.
Frequently Asked Questions
Do I lose quality when compressing?
With low or medium compression the difference is normally invisible. With high compression artifacts may be visible, especially in sharp edges. Preview is shown so you can compare.
Which image formats can be compressed?
JPEG, PNG and WebP are supported. The tool converts via canvas and exports in the same format with optimized compression.
How much do I save?
Typically 40-70% with medium compression. Photographs save the most, while already optimized images have less savings potential.