Convert JPG to ICO
Free, unlimited JPG to ICO conversion that runs entirely inside your browser. No upload, no sign-up, no watermark.
Convert your JPG files to ICO
or drop them here, or paste with Ctrl+V · files never leave your device
Settings
Nothing queued yet. Add as many files as you like — everything runs on your own device.
Nothing is uploaded
Conversion runs in your browser. Your files never touch a server, so there is no copy of them to leak.
No sign-up, no watermark
No account, no email, no daily limit, and nothing stamped across your image.
Batch and folders
Drop a hundred files at once and download the results as a single ZIP.
Works offline
Once this page has loaded you can disconnect entirely and it still works.
This converter turns JPG images into ICO files without uploading anything. The conversion runs inside this page using your own device's processor, so your photos never leave your computer — there is no server copy to worry about, no queue to wait in, and no limit on how many files you convert.
JPG is the lossy photographic format that has been the default for digital cameras and the web since 1992. Universal. If a program can open an image at all, it can open a JPG. ICO, by contrast, universal for its one job: favicons and Windows icons.
Every website needs a favicon, and .ico remains the format with the widest browser support — including the older browsers that ignore the modern PNG favicon link. Dropping your logo here produces a multi-size .ico ready to sit at the root of your site.
How to convert JPG to ICO
- Add your JPG files. Drag them onto the box above, click to browse, or paste an image straight from your clipboard. You can add as many at once as you like.
- Adjust the settings if you need to. The defaults suit most images. ICO is lossless, so there is no quality setting to adjust.
- Download the ICO file. Each file gets its own download button as soon as it finishes, and you can pull the whole batch down as a single ZIP.
What changes when you convert JPG to ICO
Every format conversion involves trade-offs, and vague tools hide them. Here is exactly what happens to your image in this particular conversion.
- ICO is lossless, so nothing further is lost — but it also cannot restore detail that JPG already threw away. Expect the ICO file to be considerably larger than the original despite containing the same visible image.
- Icons are square and capped at 256x256. A non-square image is centred and padded with transparency rather than stretched, and we write 16, 32 and 48 pixel entries into one file so browsers and Windows each pick the sharpest.
About JPEG (Joint Photographic Experts Group)
JPG is the lossy photographic format that has been the default for digital cameras and the web since 1992.
Where you probably got it: Photos from cameras, phones, and almost any website.
Strengths
- Opens in literally every image viewer, editor, printer and web form ever made
- Very small files for photographs, with a quality dial you control
- Hardware-accelerated decoding on every phone and camera
Limitations
- No transparency — transparent areas have to be flattened onto a solid colour
- Lossy: each re-save discards a little more detail permanently
- Blocky artefacts around sharp edges, text and flat colour
About ICO (Windows Icon)
ICO is the Windows icon container, and the traditional format for a website’s favicon.
Support: Universal for its one job: favicons and Windows icons.
Strengths
- Holds several sizes in one file so each context picks the sharpest
- The one favicon format every browser understands, including very old ones
- Supports transparency
Limitations
- Only useful for icons — sizes are capped at 256x256
- Not a general-purpose image format
- Awkward to create in most image editors
Is it safe to convert JPG online?
Here, yes — and you can check rather than trust. Open your browser’s developer tools, switch to the Network tab and convert a JPG file: no request carrying your image is made. Disconnect from the internet after this page has loaded and the converter still works, which would be impossible if a server were doing the conversion.
That is worth verifying wherever you convert, because most online converters do upload, and JPG files are so often scans of passports, driving licences and signed forms, which is most of what gets converted to send somewhere. Once a file is on somebody else’s server you are relying on a privacy policy rather than on anything you can observe. We wrote up how to tell a safe converter from a risky one in more detail.
Frequently asked questions
How do I convert JPG to ICO?
Drag your JPG file onto the box above, or click it to browse. The conversion starts immediately in your browser and the ICO download appears within a second or two for most images. You can drop in a whole folder of files at once and download them together as a ZIP.
Are my JPG files uploaded to a server?
No. The conversion happens locally in your browser, so your files are never transmitted anywhere — the tool even works with the network disconnected once the page has loaded. That is also why there is no file size or file count limit: nothing costs us anything per conversion. The practical ceiling is your own device's memory, which on a phone means very large images may fail.
Will converting JPG to ICO reduce the quality?
No further quality is lost — ICO is lossless. Bear in mind it also cannot recover detail the original JPG had already discarded, and the resulting file will be noticeably larger.
What size should a favicon be?
This tool writes 16x16, 32x32 and 48x48 into a single .ico, which covers browser tabs, bookmarks and the Windows desktop. Start from a square image of at least 256x256 so the downscaled versions stay sharp, and keep the design simple — at 16 pixels, fine detail disappears entirely.
What is the difference between JPG and ICO?
JPG is the lossy photographic format that has been the default for digital cameras and the web since 1992. ICO is the Windows icon container, and the traditional format for a website’s favicon. In practice the choice comes down to compatibility: universal. If a program can open an image at all, it can open a JPG. Meanwhile universal for its one job: favicons and Windows icons.