JPG vs ICO
Technical analysis 2026: differences, performance and which one you should use for your project.
Quick Verdict
"It depends on the use case: JPG excels at photography, while ICO is better for favicons."
JPG
The universal standard for digital photography. It offers excellent compression, dramatically reducing file size, though it sacrifices some quality (lossy compression).
Best for:
- Photography
- Social Media
- Web (Legacy)
ICO
A specific container for Windows icons and website favicons. It can hold multiple sizes and color depths in a single file.
Best for:
- Favicons
- Desktop icons
Detailed Analysis
When comparing JPG (Joint Photographic Experts Group) with ICO (Microsoft Icon), it is important to understand the historical and technical context. JPG was established in 1992, while ICO appeared in 1985.
The main technical difference lies in their compression algorithm. JPG uses lossy compression: it discards some data to reduce file size. ICO, on the other hand, uses hybrid (both lossy and lossless) compression: you can choose between maximum quality or maximum savings depending on the settings.
Compatibility
JPG
100% (Universal)
ICO
100% (For favicons)
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