UnlimitedConvert
JPG to ICO Converter
Turn JPG (JPEG) files into ICO in seconds. Everything happens on your device: nothing is uploaded, and there's no limit.
Your images are processed in this browser tab and never uploaded.
Why convert JPG to ICO?
JPG has no transparency and loses a little quality each time it's re-saved.
Browsers and Windows need ICO for favicons and app icons.
What to expect
- One ICO file is created with 16, 32, 48, 64, 128 and 256 pixel sizes. Non-square images are centred on a transparent square.
- Converting to ICO keeps every pixel of your JPG, but it can't restore detail that JPG compression already removed.
How to convert JPG to ICO
Add your files
Drop your JPG files into the box or tap “select files”. Add as many as you like.
Pick the options
Nothing to set: every favicon size from 16 to 256 pixels goes into one file.
Convert and download
Press Convert. Download each ICO on its own, or everything at once as a ZIP file.
JPG vs ICO
| JPG | ICO | |
|---|---|---|
| Full name | JPEG (Joint Photographic Experts Group) | Windows Icon |
| Compression | Lossy | Lossless |
| Transparency | No | Yes |
| Animation | No | No |
| Best for | photos you want to share, email or upload anywhere | website favicons and Windows app icons |
| Support | Opens on every phone, computer, browser and app. | Used by all browsers for favicons and by Windows for icons. |
About the formats
JPG (JPEG (Joint Photographic Experts Group), 1992) is the most widely used photo format in the world. It uses lossy compression that throws away detail the eye barely notices, which keeps photos small. JPG and JPEG are the same format: the shorter extension comes from old Windows versions that only allowed three letters.
ICO (Windows Icon, 1985) is the icon format used by Windows and by website favicons. One ICO file can hold several sizes (16×16 up to 256×256), so the right one is shown in tabs, desktops and taskbars.
Frequently asked questions
How do I convert JPG to ICO?
Drop your JPG files into the box above (or tap Select files), check the options, then press Convert. Each ICO downloads on its own, or you can download them all as one ZIP file.
Are my files uploaded anywhere?
No. The conversion runs entirely in your browser on your own device. Your JPG files are never sent to a server, so they stay private, and it works even on a slow connection once the page has loaded.
Is there a limit on how many JPG files I can convert?
No. Convert as many as you like, for free, without signing up. Very large batches are processed one after another so your browser stays responsive.
What size should a favicon be?
Modern sites use a 32×32 favicon, with 16×16 for older browsers and larger sizes for shortcuts. This converter puts 16, 32, 48, 64, 128 and 256 pixel versions into one ICO file, so you only need one. Use a square image for the best result.
Will I lose quality converting to ICO?
No. ICO is lossless, so the converted image keeps every pixel of the original.
Does it work on iPhone and Android?
Yes. It works in Safari, Chrome, Firefox and Edge on phones, tablets and computers. Nothing to install.