ICO vs JPEG: Which Should You Use?

Side-by-side comparison of ICO and JPEG image formats — features, pros, cons, and conversion options.

Quick Answer

ICO is best for Website favicons and Windows application icons. JPEG is best for Photographs and complex images for web and print.

Quick Verdict

ICO Best for Website favicons and Windows application icons

✓ Multiple sizes in one file
✓ Transparency support
✓ Required for website favicons
✗ Limited to small sizes

Convert ICO to JPEG →

JPEG Best for Photographs and complex images for web and print

✓ Universal compatibility
✓ Excellent compression for photos
✓ Small file sizes
✗ Lossy compression (quality degrades)

Convert JPEG to ICO →

Specs Comparison

Side-by-side technical comparison of ICO and JPEG

Feature	ICO	JPEG
Category	Image	Image
Year Introduced	1985	1992
MIME Type	image/x-icon	image/jpeg
Extensions	.ico	.jpg, .jpeg
Lossy	✗	✓
Lossless	✓	✗
Transparency	✓	✗
Animation	✗	✗
Max Color Depth	32-bit	8-bit
Hdr	✗	✗

Pros & Cons

ICO

Pros

✓ Multiple sizes in one file
✓ Transparency support
✓ Required for website favicons

Cons

✗ Limited to small sizes
✗ Windows-centric
✗ Outdated for modern web (use PNG/SVG)

JPEG

Pros

✓ Universal compatibility
✓ Excellent compression for photos
✓ Small file sizes

Cons

✗ Lossy compression (quality degrades)
✗ No transparency
✗ No animation

When to Use Each

Choose ICO when...

You need files optimized for Website favicons and Windows application icons
Multiple sizes in one file
Transparency support
You need lossless quality

Choose JPEG when...

You need files optimized for Photographs and complex images for web and print
Universal compatibility
Excellent compression for photos

How to Convert

Convert between ICO and JPEG for free on ChangeThisFile

Convert ICO to JPEG Runs in your browser — files never leave your device Convert JPEG to ICO Runs in your browser — files never leave your device

Frequently Asked Questions

What's the difference between ICO and JPEG?

ICO is best for Website favicons and Windows application icons, while JPEG is best for Photographs and complex images for web and print. Both are image formats but they differ in compression, compatibility, and intended use cases.

Is ICO or JPEG better for image?

It depends on your use case. ICO is better for Website favicons and Windows application icons. JPEG is better for Photographs and complex images for web and print. Consider your specific requirements when choosing between them.

How do I convert ICO to JPEG?

Go to the ICO to JPEG converter on ChangeThisFile. The conversion runs entirely in your browser — your file never leaves your device. It's free with no signup required.

Can I convert JPEG to ICO?

Yes. ChangeThisFile supports JPEG to ICO conversion. The conversion runs in your browser with no upload required.

Which is smaller, ICO or JPEG?

File size depends on the content and compression settings. ICO preserves full quality. JPEG uses lossy compression for smaller files. For the smallest files, choose the format with lossy compression that meets your quality needs.

Does ICO support lossy?

No, ICO does not support lossy, whereas JPEG does. This may be an important factor depending on your use case.

Is ICO or JPEG free to use?

Both ICO and JPEG are supported file formats that are free to use. You can convert between them for free on ChangeThisFile — browser-based conversions have no limits and your files never leave your device.

Which format is newer, ICO or JPEG?

JPEG is newer — it was introduced in 1992, while ICO dates back to 1985. Newer formats often offer better compression and features, but older formats tend to have wider compatibility.