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What is FITS?

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

What is PNG?

PNG (Portable Network Graphics) is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for GIF.

When Should You Use FITS vs PNG?

Use FITS When...

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

Use PNG When...

Reach for PNG when your priority is graphics, logos, images requiring transparency — its uncompromising quality ensures every detail is preserved.

FITS vs PNG: Key Differences

  • •FITS uses lossless compression while PNG uses lossless compression — both take the same approach to file size management.
  • •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: PNG handles transparency.
  • •Storage footprint: Varies from 1MB to several GB for FITS vs 20KB to several MB for PNG.
  • •Use case fit: FITS targets astronomy, scientific imaging, research and PNG targets graphics, logos, images requiring transparency — your choice depends on which workflow stage you are serving.

Advantages of FITS

  • ✓FITS applies lossless compression specifically calibrated for Astronomy, scientific imaging, research.
  • ✓FITS enjoys broad native support across operating systems, browsers, and creative tools alike.
  • ✓FITS guarantees every bit of the original data survives — no approximations, no shortcuts.
  • ✓You will find FITS support built into virtually every tool that handles Astronomy, scientific imaging, research — no plugins or converters needed.

Advantages of PNG

  • ✓PNG uses lossless compression tailored for Graphics, logos, images requiring transparency.
  • ✓PNG is supported natively on virtually every device, browser, and operating system.
  • ✓PNG files are bit-for-bit perfect, preserving every pixel and sample for professional work.
  • ✓PNG integrates seamlessly with all major creative tools and workflows.

Common Use Cases for FITS to PNG Conversion

  • Social media posts and ads
  • Digital photography and editing
  • Graphic design projects
  • E-commerce product images
  • Email marketing campaigns
  • Presentation graphics

Industry Applications

PhotographySocial Media MarketingPrint PublishingE-commerceDigital ArtUI/UX Design

Best Practices for FITS to PNG Conversion

  • →When converting FITS to PNG, check whether PNG supports transparency — if not, your transparent areas will be filled with a solid color
  • →Use PNG for maximum quality archival and FITS 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 FITS and PNG formats in our detailed guide.

Troubleshooting FITS to PNG Conversion

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

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Convert FITS to PNG Online - Free & Fast

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

Image Converter

Upload or enter a URL to convert FITS to PNG instantly

Click to upload or drag & drop FITS file

or paste from clipboard

.fits,.FITS (max 100MB)

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About FITS and PNG

FITS

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

PNG

PNG (PNG images) - Portable Network Graphics - lossless compression with transparency. Ideal for graphics, logos, images requiring transparency.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from astronomy, scientific imaging, research to graphics, logos, images requiring transparency
File Size~20KB to several MB after conversion

FAQs

Is converting FITS to PNG free?

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

How long does it take to convert FITS to PNG?

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

What is PNG best used for?

PNG is ideal for graphics, logos, images requiring transparency. Portable Network Graphics - lossless compression with transparency

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

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

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