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What is PSB?

Photoshop Big (PSB) is Adobe's large document format, extending PSD to support images up to 300,000 pixels and 4 exabytes in size.

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 PSB vs FITS?

Use PSB When...

Reach for PSB when your priority is large-format graphic design, billboard artwork — 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.

PSB vs FITS: Key Differences

  • •The core technical difference: PSB 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.
  • •Transparency: N/A - Scientific data format
  • •PSB files are typically Can exceed 2GB while FITS files range Varies from 1MB to several GB
  • •Primary audience: PSB is built for large-format graphic design, billboard artwork scenarios, while FITS focuses on astronomy, scientific imaging, research — pick the format that matches your output requirement.

Advantages of PSB

  • ✓PSB compresses data using lossless methods, keeping file sizes manageable for Large-format graphic design, billboard artwork.
  • ✓Industry-wide support means PSB files open anywhere — from legacy systems to the latest devices.
  • ✓Lossless quality makes PSB the gold standard for archival and master copies.
  • ✓From professional software to open-source alternatives, PSB 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 PSB 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 PSB to FITS Conversion

  • →When converting PSB 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 PSB 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

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

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

Troubleshooting PSB to FITS Conversion

  • !Converting PSB to FITS gives blurry output → increase the quality setting before conversion
  • !Colors look different in FITS than PSB → 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 PSB turned white in FITS → FITS may not support transparency

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Convert PSB to FITS Online - Free & Fast

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

Image Converter

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About PSB and FITS

PSB

PSB (PSB large docs) - Photoshop Big, large document format for 2GB+ PSD files. Best for large-format graphic design, billboard artwork.

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 large-format graphic design, billboard artwork to astronomy, scientific imaging, research
File Size~Varies from 1MB to several GB after conversion

FAQs

Is converting PSB to FITS free?

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

How long does it take to convert PSB to FITS?

Most PSB 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 PSB to FITS?

File size after PSB 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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