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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.

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 PNG vs FITS?

Use PNG When...

Reach for PNG when your priority is graphics, logos, images requiring transparency — 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.

PNG vs FITS: Key Differences

  • •The core technical difference: PNG 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.
  • •PNG files are typically 20KB to several MB while FITS files range Varies from 1MB to several GB
  • •Primary audience: PNG is built for graphics, logos, images requiring transparency scenarios, while FITS focuses on astronomy, scientific imaging, research — pick the format that matches your output requirement.

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.

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.

Common Use Cases for PNG to FITS Conversion

  • Product photography for marketplaces
  • Digital art portfolios
  • Brochure and flyer design
  • Newsletter graphics
  • Video thumbnail creation
  • Certificate and badge design

Industry Applications

Content ManagementMedical ImagingReal Estate PhotographyGame DevelopmentScientific VisualizationE-learning Content

Best Practices for PNG to FITS Conversion

  • →When converting PNG 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 PNG 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 PNG and FITS formats in our detailed guide.

Troubleshooting PNG to FITS Conversion

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

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Convert PNG to FITS Online - Free & Fast

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

Image Converter

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About PNG and FITS

PNG

PNG is widely used for Graphics, logos, images requiring transparency. While it is the go-to format in its domain, converting to FITS gives you flexible image transport system, scientific data format, making your files more suitable for different workflows and platforms.

FITS

FITS is designed for Astronomy, scientific imaging, research. Converting from PNG unlocks flexible image transport system, scientific data format, ensuring your files work optimally in astronomy, scientific imaging, research environments.

Common Use Cases

  • Convert PNG files to FITS for better compatibility with astronomy, scientific imaging, research applications.
  • Leverage FITS's strengths — flexible image transport system, scientific data format — when working with content originally in PNG format.
  • Optimize your workflow by switching from PNG to FITS when astronomy, scientific imaging, research is your primary need.
  • Ensure smooth sharing and processing by converting PNG to the widely supported FITS format.

Format Comparison

CompressionLossless → Lossless
TransparencySupported
Use CaseConvert from graphics, logos, images requiring transparency to astronomy, scientific imaging, research
File Size~Varies from 1MB to several GB after conversion

FAQs

Is converting PNG to FITS free?

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

How long does it take to convert PNG to FITS?

Most PNG 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 PNG to FITS?

File size after PNG 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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