Converting JPG to ICO produces a Windows icon file suitable for favicons, desktop shortcuts, or application icons. The converter generates the standard icon sizes (16, 32, 48, 256) in a single .ico, letting Windows and browsers pick the right one for each context.
Drag & drop image files here, or browse
Drop your JPG files here
JPG's lossy artifacts and lack of alpha channel are fundamental mismatches for icon work. Icons need sharp edges and clean transparency; JPG has neither. The result works but looks noticeably worse than an ICO built from a PNG source.
ICO is handled by every browser (for favicons), every Windows version, and most icon-aware tooling. It's the native Windows icon format.
JPG (JPEG) is a 1992 lossy photo format that became the default way to store photographs on the web. It uses a discrete cosine transform plus quantization, tuned so that errors fall where human vision is least sensitive. No transparency, no animation, but excellent for photos at 70–90% quality.
ICO is the Windows icon format. A single .ico file can hold multiple resolutions (16×16, 32×32, 48×48, 256×256) and color depths simultaneously, letting the OS pick the best for context. Every browser serves favicons as ICO, and Windows desktop icons use it natively.
No. JPG doesn't support transparency, so whatever was the JPG's background color becomes the icon's opaque background. For transparent icons, convert from a PNG source.
The standard Windows favicon sizes: 16×16, 32×32, 48×48, and 256×256. Windows and browsers pick the closest match to what they need to display.
JPG (JPEG) is a 1992 lossy photo format that became the default way to store photographs on the web. It uses a discrete cosine transform plus quantization, tuned so that errors fall where human vision is least sensitive. No transparency, no animation, but excellent for photos at 70–90% quality.
ICO is the Windows icon format. A single .ico file can hold multiple resolutions (16×16, 32×32, 48×48, 256×256) and color depths simultaneously, letting the OS pick the best for context. Every browser serves favicons as ICO, and Windows desktop icons use it natively.
Yes. The converter runs entirely in your browser using WebAssembly. Your images are never uploaded, never sent to a server, and never leave your device.
There's no hard limit, but because everything runs in your browser you're bounded by available memory. Very large images (over a few hundred megapixels) can hit browser memory limits. Process in smaller batches if you run into issues.