ICO vs PNG: Which Should You Use?

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

Quick Answer

ICO is best for Website favicons and Windows application icons. PNG is best for Graphics with transparency, screenshots, and diagrams.

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 PNG →

PNG Best for Graphics with transparency, screenshots, and diagrams

✓ Lossless compression
✓ Full transparency support
✓ Universal web support
✗ Larger than JPEG for photos

Convert PNG to ICO →

Specs Comparison

Side-by-side technical comparison of ICO and PNG

Feature	ICO	PNG
Category	Image	Image
Year Introduced	1985	1996
MIME Type	image/x-icon	image/png
Extensions	.ico	.png
Lossy	✗	✗
Lossless	✓	✓
Transparency	✓	✓
Animation	✗	✗
Max Color Depth	32-bit	16-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✗ Outdated for modern web (use PNG/SVG)

PNG

Pros

✓ Lossless compression
✓ Full transparency support
✓ Universal web support

Cons

✗ Larger than JPEG for photos
✗ No animation (use APNG)
✗ No lossy mode

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 PNG when...

You need files optimized for Graphics with transparency, screenshots, and diagrams
Lossless compression
Full transparency support
You need lossless quality

How to Convert

Convert between ICO and PNG for free on ChangeThisFile

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

Frequently Asked Questions

What's the difference between ICO and PNG?

ICO is best for Website favicons and Windows application icons, while PNG is best for Graphics with transparency, screenshots, and diagrams. Both are image formats but they differ in compression, compatibility, and intended use cases.

Is ICO or PNG better for image?

It depends on your use case. ICO is better for Website favicons and Windows application icons. PNG is better for Graphics with transparency, screenshots, and diagrams. Consider your specific requirements when choosing between them.

How do I convert ICO to PNG?

Go to the ICO to PNG 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 PNG to ICO?

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

Which is smaller, ICO or PNG?

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

Does ICO have the same features as PNG?

ICO and PNG share some features but differ in others. Check the feature comparison table above for a detailed side-by-side breakdown.

Is ICO or PNG free to use?

Both ICO and PNG 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 PNG?

PNG is newer — it was introduced in 1996, while ICO dates back to 1985. Newer formats often offer better compression and features, but older formats tend to have wider compatibility.