Photoshop Big (PSB) is Adobe's large document format, extending PSD to support images up to 300,000 pixels and 4 exabytes in size.
Apple Icon Image (ICNS) is the native icon format for macOS, supporting multiple resolutions including Retina in a single file.
Reach for PSB when your priority is large-format graphic design, billboard artwork — its uncompromising quality ensures every detail is preserved.
Reach for ICNS when your priority is macos application icons, retina display icons — its uncompromising quality ensures every detail is preserved.
Learn more about PSB and ICNS formats in our detailed guide.
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.psb,.PSB (max 100MB)
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PSB (PSB large docs) - Photoshop Big, large document format for 2GB+ PSD files. Best for large-format graphic design, billboard artwork.
ICNS (ICNS icons) - Apple Icon Image, high-resolution macOS icon format. Ideal for macos application icons, retina display icons.
Yes, GoConvertFile offers free conversion of PSB to ICNS for files up to 100MB. No registration required.
Most PSB to ICNS conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
ICNS is ideal for macos application icons, retina display icons. Apple Icon Image, high-resolution macOS icon format
File size after PSB to ICNS conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.