Apple Icon Image (ICNS) is the native icon format for macOS, supporting multiple resolutions including Retina in a single file.
JPEG 2000 is a wavelet-based image compression standard offering superior compression ratios and resolution scalability for archival.
Reach for ICNS when your priority is macos application icons, retina display icons — its uncompromising quality ensures every detail is preserved.
Reach for JP2 when your priority is medical imaging, archival, digital cinema — its efficient compression makes sharing fast and storage minimal.
Learn more about ICNS and JP2 formats in our detailed guide.
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ICNS (ICNS icons) - Apple Icon Image, high-resolution macOS icon format. Best for macos application icons, retina display icons.
JP2 (JPEG 2000 images) - JPEG 2000, wavelet-based compression for archival quality. Ideal for medical imaging, archival, digital cinema.
Yes, GoConvertFile offers free conversion of ICNS to JP2 for files up to 100MB. No registration required.
Most ICNS to JP2 conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
JP2 is ideal for medical imaging, archival, digital cinema. JPEG 2000, wavelet-based compression for archival quality
Yes, converting ICNS to JP2 uses lossy compression, which reduces file size by discarding some visual data. Set quality to 85-95% for a good balance of quality and file size.
JP2 files are typically 50-80% smaller than ICNS files because JP2 uses efficient lossy compression. The exact reduction depends on quality settings.
No, JP2 does not support transparency. Any transparent areas in your ICNS will be filled with a solid color (usually white) during conversion. Use PNG or WebP if transparency is needed.