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What is EXR?

OpenEXR is a high-dynamic-range raster image format developed by Industrial Light & Magic for the VFX and film industry.

What is FITS?

Flexible Image Transport System (FITS) is a scientific data format used primarily in astronomy for storing and transmitting images and datasets.

When Should You Use EXR vs FITS?

Use EXR When...

Reach for EXR when your priority is vfx, 3d rendering, hdr imaging — its uncompromising quality ensures every detail is preserved.

Use FITS When...

Reach for FITS when your priority is astronomy, scientific imaging, research — its uncompromising quality ensures every detail is preserved.

EXR vs FITS: Key Differences

  • •The core technical difference: EXR relies on lossless compression whereas FITS uses lossless compression.
  • •Neither format changes compression philosophy — both are lossless compression — so any size differences are due to encoding efficiency, not a shift in quality approach.
  • •Alpha channel support: FITS lacks transparency support.
  • •EXR files are typically 15-100MB for high-res HDR frames while FITS files range Varies from 1MB to several GB
  • •EXR is optimized for vfx, 3d rendering, hdr imaging while FITS is designed for astronomy, scientific imaging, research — choose based on your specific workflow needs

Advantages of EXR

  • ✓EXR compresses data using lossless methods, keeping file sizes manageable for VFX, 3D rendering, HDR imaging.
  • ✓Industry-wide support means EXR files open anywhere — from legacy systems to the latest devices.
  • ✓Lossless quality makes EXR the gold standard for archival and master copies.
  • ✓From professional software to open-source alternatives, EXR works out of the box.

Advantages of FITS

  • ✓FITS compresses data using lossless methods, keeping file sizes manageable for Astronomy, scientific imaging, research.
  • ✓Industry-wide support means FITS files open anywhere — from legacy systems to the latest devices.
  • ✓Lossless quality makes FITS the gold standard for archival and master copies.
  • ✓From professional software to open-source alternatives, FITS works out of the box.

Common Use Cases for EXR to FITS Conversion

  • Websites and online content
  • Print materials and publications
  • Social media posts and ads
  • Digital photography and editing
  • Graphic design projects
  • E-commerce product images

Industry Applications

Web DevelopmentGraphic DesignPhotographySocial Media MarketingPrint PublishingE-commerce

Best Practices for EXR to FITS Conversion

  • →When converting EXR to FITS, check whether FITS supports transparency — if not, your transparent areas will be filled with a solid color
  • →Use FITS for maximum quality archival and EXR for smaller file sizes when quality is less critical
  • →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

JPG vs PNG vs WebP: Which Image Format Should You Use?

Learn more about EXR and FITS formats in our detailed guide.

Troubleshooting EXR to FITS Conversion

  • !Converting EXR to FITS gives blurry output → increase the quality setting before conversion
  • !Colors look different in FITS than EXR → check color profile mismatch (sRGB vs Adobe RGB)
  • !File size changed more than expected → FITS uses different compression, file size differences of 2-5x are normal
  • !Transparent areas in EXR turned white in FITS → FITS may not support transparency

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Convert EXR to FITS Online - Free & Fast

Convert EXR files to FITS online for free. High-quality conversion with no registration required.

Image Converter

Upload or enter a URL to convert EXR to FITS instantly

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.exr,.EXR (max 100MB)

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About EXR and FITS

EXR

EXR (OpenEXR images) - OpenEXR, high-dynamic-range raster format for film. Best for vfx, 3d rendering, hdr imaging.

FITS

FITS (FITS data) - Flexible Image Transport System, scientific data format. Ideal for astronomy, scientific imaging, research.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from vfx, 3d rendering, hdr imaging to astronomy, scientific imaging, research
File Size~Varies from 1MB to several GB after conversion

FAQs

Is converting EXR to FITS free?

Yes, GoConvertFile offers free conversion of EXR to FITS for files up to 100MB. No registration required.

How long does it take to convert EXR to FITS?

Most EXR to FITS conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is FITS best used for?

FITS is ideal for astronomy, scientific imaging, research. Flexible Image Transport System, scientific data format

What file size should I expect after converting EXR to FITS?

File size after EXR to FITS conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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