Does converting JPG to ICO improve the image quality?

No. JPG already threw detail away when it was saved, and that detail does not come back. Writing the lossless ICO preserves the picture you have now, but the file is usually several times larger.

What happens to transparency?

There is nothing to preserve: JPG has no transparency, so this does not come up.

Is there a file size limit?

No limit that we impose. The only ceiling is your device's memory, so a very large photo or a long recording may take a few seconds.

Are my files uploaded anywhere?

No. The conversion runs inside this browser tab, so the file never leaves your device — go offline once the page has loaded and keep converting.

JPG to ICO converter

Convert JPG files to ICO right in your browser. Nothing is uploaded, there is no sign-up, and there is no file limit.

Runs on your device
No upload, no queue
Batch + ZIP download

Drop files here, or click to choose

Supports PNG, JPG, WEBP, AVIF, BMP, GIF, SVG, HEIC, TIFF and ICO — and writes GIF, TIFF and PDF too. Files stay on your device.

Convert to

Max width (px, optional)

Quality

How to convert JPG to ICO

Drop your JPG file onto the box above, or click it to browse.
Choose ICO as the output format.
Press convert, then download the result.

JPG vs ICO

JPG works well for photographs and email attachments. ICO works well for favicons and app icons. The table below compares the two on the things that usually decide the choice.

	JPG	ICO
Compression	Lossy	Lossless
Transparency	No	Yes
Best for	photographs and email attachments	favicons and app icons

Questions about JPG to ICO

Does converting JPG to ICO improve the image quality?: No. JPG already threw detail away when it was saved, and that detail does not come back. Writing the lossless ICO preserves the picture you have now, but the file is usually several times larger.
What happens to transparency?: There is nothing to preserve: JPG has no transparency, so this does not come up.
Is there a file size limit?: No limit that we impose. The only ceiling is your device's memory, so a very large photo or a long recording may take a few seconds.
Are my files uploaded anywhere?: No. The conversion runs inside this browser tab, so the file never leaves your device — go offline once the page has loaded and keep converting.

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