// ABOUT JPEG
JPEG uses lossy compression optimised for photographic content. It discards visual information the human eye is unlikely to notice, achieving compression ratios of 10:1 or higher with minimal perceptible quality loss. JPEG does not support transparency — any alpha channel is flattened against a white background.
// ABOUT ICO
ICO is the standard Windows icon container format used for favicons and application icons. A single ICO file can embed multiple resolutions (16x16, 32x32, 48x48, 256x256) so the operating system or browser can select the most appropriate size. ICO is the required format for the classic favicon.ico file that browsers request from every website.
// WHY CONVERT
Converting JPEG to ICO is useful when you need your image in a format suited for website favicons, Windows desktop application icons, Windows Explorer thumbnails, and shortcut icons. Image Toolz runs the entire conversion directly in your browser. Nothing is uploaded to any server — your files remain completely private on your device. The tool handles images up to 200 MB and most conversions complete in under a second.
// FAQ
What is JPEG?
JPEG is a lossy format for photographs commonly used across the web and as the default output for digital cameras and phone cameras.
What is ICO?
ICO is the Windows icon container format used for favicons and application icons. It can embed multiple sizes within a single file.
Will converting JPEG to ICO lose quality?
Icons are typically displayed at small sizes, so downscaling from a large JPEG is expected. Quality is acceptable for most favicon use cases at standard sizes.
Is it safe to convert my files here?
Yes. All conversion runs entirely in your browser. Your images are never uploaded to any server and nothing leaves your device.