JFIF to ICO converter

Convert JFIF to ICO in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.

I have Choose files or drop them here, JFIF files

I want ICO

Quality 90%

Background for transparent areas

Icon sizes

How to make the SVG

Tracing suits logos, icons and flat artwork and scales cleanly. Photos are better kept as pixels inside the SVG.

Colors to trace 16

Black below 50%

Dither Scatters black dots to suggest gray, instead of a hard cut-off.

Advanced 5

Keep the animation For animated GIF, WebP and APNG sources. Turn off to save just the first frame.

Rotate

Mirror horizontally

Mirror vertically

Resize: longest side

For an exact width and height, use the Resize Image tool instead.

Bytes of your files sent anywhere: 0 B · nothing leaves this tab

Other ways to convert JFIF

Convert other formats to ICO

Read more about the JFIF format and the ICO format, or see every image tool and all image conversions.

Should you convert JFIF to ICO?

Yes, if you need a favicon or a Windows icon. Start from a square JFIF of at least 256 pixels, with a transparent background if it has one, so every size inside the ICO comes out crisp.

ICO is also the more widely supported of the two: it opens almost everywhere, while JFIF is has patchy support.

JFIF is an ordinary JPEG photo that carries the .jfif extension; ICO is a small container that holds the same icon at several sizes. Use ICO for a favicon.ico at the root of a website, or an icon for a Windows program or shortcut.

JFIF and ICO compared
Property	JFIF	ICO
Compression	Lossy	Lossless
Transparency	No	Yes
Animation	No	No
Support	Has patchy support	Opens almost everywhere
Best for	Nothing in particular — it is a JPEG with a confusing name	Website favicons and Windows shortcuts
Introduced	1992	1985

How to convert JFIF to ICO

01
Add your JFIF

Drop your JFIF image onto the box, or click to choose it. It is read from your disk and stays there.
02
Check the settings

The output is already set to ICO. Change the quality if you want to; the defaults suit most files.
03
Save the ICO

Press convert and save the ICO. Several files come back together as a ZIP.

What changes when JFIF becomes ICO

ICO can’t add back what JFIF removed

The JFIF was compressed when it was saved, and that detail is gone. ICO records exactly what the JFIF contains now, compression marks included, and keeps it that way however often you edit and re-save.

One ICO, every size

The ICO holds 16, 24, 32, 48, 64, 128 and 256 pixel versions, each scaled from your JFIF and centered on a transparent square. Browsers and Windows pick the size they need.

Expect a larger file

ICO generally takes more room than JFIF. If the file has to fit an upload limit, check the size once it’s converted. JFIF: The same size as the equivalent JPG. ICO: A full favicon with every size is usually under 100 KB.

This page is put together from our notes on each format, choosing only what is true of JFIF and ICO, so every pairing states the same facts the same way. How these pages are made.

Why it doesn’t upload

Changing a picture’s format is work your browser already knows how to do. Sending your photos to a server first only adds waiting and risk, so nothing is sent.

How to check for yourself

Worth knowing

About the JFIF. People assume a .jfif file is a special format. It is a normal JPEG; the only real problem is forms that look at the extension and say no.
About the ICO. Renaming a PNG to favicon.ico works in some browsers and silently fails in others. A real ICO holds several sizes so each place picks the right one.
DDS, PSD, EXR, XWD and JPEG 2000 are read by the FFmpeg engine, a one-time 31 MB download.

Questions

Will converting JFIF to ICO lose quality?

No further quality is lost: ICO keeps exactly what is in the JFIF. It can’t undo compression the JFIF already has.

Will the ICO be smaller than the JFIF?

Expect a larger file. ICO generally takes more room than JFIF. If the file has to fit an upload limit, check the size once it’s converted. JFIF: The same size as the equivalent JPG. ICO: A full favicon with every size is usually under 100 KB.