FITS vs PPM — Comparison & Free Converter
Fast, instant FITS to PPM conversion. No signup required. Just drop your .fits file and get .ppm in seconds.
Batch Settings
天文学の観測データでよく用いられるFITSファイル。その膨大な情報量を、一般的な画像ビューアで手軽に開けるPPM形式へと変換したいとお考えではありませんか？FITSは科学的な精密さを誇る一方で、日常使いやウェブでの共有には少々不便な点もございます。特に、大切な画像データを同僚や友人と共有する際、相手の環境に左右されずにスムーズに閲覧してもらいたい、あるいは、ご自身のブログやSNSで手軽に公開したいといった場面では、汎用性の高いPPM形式への変換が非常に役立ちます。当ツールは、そうした皆様のニーズに応えるべく、FITSファイルをPPM形式へ簡単に、そして正確に変換するお手伝いをいたします。複雑な設定は不要です。ぜひ一度お試しください。
- 学会発表資料での画像利用
- 同人誌での天体写真掲載
- 社内向け技術資料への組み込み
FITSからPPMへの変換は、特に縦書き文化を持つ日本において、画像編集ソフトでの取り扱いやすさや、フォントの埋め込みを考慮した資料作成時に重宝されます。
About FITS to PPM Conversion
FITS or PPM — which format should you use? The answer depends on your needs. Here's a quick breakdown.
FITS is a widely used file format. It has common platform support. PPM (Portable Pixmap) is a simple uncompressed image format used in scientific imaging. It has niche platform support.
So when should you convert FITS to PPM? This conversion is ideal when you When you need a PPM file. This conversion helps you convert between formats quickly.
Converting FITS to PPM maintains high quality with CocoConvert's optimised encoder settings.
If you've decided PPM is the right choice, CocoConvert makes the conversion effortless. Upload your .fits file, pick PPM, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert FITS to PPM
- 1
Choose your FITS file
Upload your .fits file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to PPM
Select .ppm from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large image files.
- 4
Get your PPM file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert FITS to PPM
Your FITS file is decoded and re-encoded as PPM.
Your FITS file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in PPM format
The converted file is ready for download
Format Comparison
FITS
.fits file
| Extension | .fits |
| MIME Type | image/fits |
| Category | Image |
PPM
.ppm file
| Extension | .ppm |
| MIME Type | image/x-portable-pixmap |
| Category | Image |
Should You Convert FITS to PPM?
When to Convert
- ✓When you need a PPM file
Frequently Asked Questions
Should I use FITS or PPM?
It depends on your goal. FITS preserves full quality. PPM preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is PPM higher quality than FITS?
Not necessarily. Converting FITS to PPM maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert FITS to PPM on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for FITS to PPM?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for FITS to PPM?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.