You can input JPEG, PNG, WebP, GIF and BMP images. Output formats are WebP (smaller file size, ideal for the web) and PNG (lossless, best for graphics with transparency or text).
What is WebP and why use it?
WebP is a modern image format from Google that produces files 25โ35% smaller than JPEG or PNG at equivalent visual quality. All modern browsers support it. Converting your website images to WebP reduces page load times and saves bandwidth.
Does conversion reduce image quality?
PNG conversion is always lossless. WebP conversion at 90% quality (the default) is visually indistinguishable from the original for most images. Set quality to 100 for lossless WebP output if you need to preserve every pixel.
Are my images uploaded anywhere?
No. All conversion happens in your browser using the HTML5 Canvas API. Your images never leave your device. This means the tool works offline after the page has loaded and is completely private.