What is IIQ?

Phase One IIQ is a professional medium-format raw format used by Phase One digital backs, delivering exceptional image quality for commercial photography.

What is JNG?

JPEG Network Graphics (JNG) is a hybrid format using JPEG-compressed image data with optional PNG-compressed alpha channel.

When Should You Use IIQ vs JNG?

IIQ vs JNG: Key Differences

• •The core technical difference: IIQ relies on lossless compression whereas JNG uses lossy compression.
• •The switch from lossless compression to lossy compression means you gain significant space savings while accepting minor quality trade-offs.
• •Transparency: Separate alpha channel via PNG — converting from IIQ will merge transparency into a solid background
• •Storage footprint: 50-150MB per image from medium-format backs for IIQ vs Smaller than MNG for photos for JNG.
• •IIQ is optimized for professional studio photography, digital back capture while JNG is designed for legacy web animation, lossy image sequences — choose based on your specific workflow needs

Advantages of IIQ

• ✓IIQ applies lossless compression specifically calibrated for Professional studio photography, digital back capture.
• ✓IIQ enjoys broad native support across operating systems, browsers, and creative tools alike.
• ✓IIQ guarantees every bit of the original data survives — no approximations, no shortcuts.
• ✓You will find IIQ support built into virtually every tool that handles Professional studio photography, digital back capture — no plugins or converters needed.

Advantages of JNG

• ✓At its core, JNG relies on lossy encoding — a design choice that makes it perfect for Legacy web animation, lossy image sequences.
• ✓You won't run into compatibility issues with JNG — it's a universal standard across platforms.
• ✓File size management with JNG: aggressive compression with minimal visible quality loss.
• ✓Every major application in the Legacy web animation, lossy image sequences space supports JNG natively.

Common Use Cases for IIQ to JNG Conversion

• Mobile app UI assets
• Product photography for marketplaces
• Digital art portfolios
• Brochure and flyer design
• Newsletter graphics
• Video thumbnail creation

Industry Applications

Best Practices for IIQ to JNG Conversion

• →When converting IIQ to JNG, check whether JNG supports transparency — if not, your transparent areas will be filled with a solid color
• →Use JNG for maximum quality archival and IIQ for lossless workflows
• →Optimize images for web to reduce page load times — tools like our converter let you adjust quality settings before conversion
• →Maintain original aspect ratio to avoid distortion during conversion
• →Always keep a backup of your original files before converting
• →Choose the appropriate quality settings for your specific use case

Related Article

Troubleshooting IIQ to JNG Conversion

• !JNG shows visible compression artifacts → lower the compression level or switch to a lossless variant
• !The converted JNG image looks washed out → the source IIQ likely uses a wider color space than JNG supports
• !JNG file is much larger than expected → check if the conversion preserved an unnecessarily high resolution
• !Text in the converted JNG looks fuzzy → text-heavy images benefit from higher quality settings or a different output format

Related Image Converters

All Image Formats

More Image tools

Related Tools