XWD Won't Open? Convert to FITS Instantly
Fast, instant XWD to FITS conversion. No signup required. Just drop your .xwd file and get .fits in seconds.
Batch Settings
XWD（X Window Dump）形式の画像をFITS（Flexible Image Transport System）形式へ変換する際、多くのユーザー様がその過程でデータの整合性や画質の維持に懸念を抱かれることと存じます。特に、天文学や科学分野で広く利用されるFITS形式への変換では、元の画像データが持つ情報が正確に引き継がれることが不可欠です。当社の変換ツールは、複雑な設定を必要とせず、直感的な操作でXWD画像をFITSファイルへとスムーズに移行させます。このプロセスを通じて、お客様の貴重な画像データが、新しい環境で最大限に活用されるよう、細心の注意を払って設計されています。データの品質を損なうことなく、効率的なファイル変換を実現いたしますので、どうぞご安心ください。
- 天文台での観測データ整理
- 大学研究室での画像解析
- 科学教育機関での教材作成
日本では、特に天文学研究機関においてFITS形式の利用が一般的であり、XWD形式で保存された古い観測データをFITSに変換するニーズが散見されます。この変換により、既存の解析ソフトウェアとの連携が容易になります。
About XWD to FITS Conversion
Dealing with a XWD file that won't open on your device? You're not alone — XWD compatibility issues are one of the most common reasons people search for a file converter. XWD is a widely used file format.
The fix is simple: convert your XWD to FITS. FITS is a widely used file format. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting XWD to FITS maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your XWD file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you When you need a FITS file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert XWD to FITS
- 1
Add your XWD file
Drag and drop your .xwd file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick FITS output
Select .fits as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The image engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .fits file. For batch jobs, download all at once as a zip.
What Happens When You Convert XWD to FITS
Your XWD file is decoded and re-encoded as FITS.
Your XWD file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in FITS format
The converted file is ready for download
Format Comparison
XWD
.xwd file
| Extension | .xwd |
| MIME Type | image/x-xwindowdump |
| Category | Image |
FITS
.fits file
| Extension | .fits |
| MIME Type | image/fits |
| Category | Image |
Should You Convert XWD to FITS?
When to Convert
- ✓When you need a FITS file
Frequently Asked Questions
Why won't my XWD file open?
XWD files may not open if your device lacks the right codec or application. Converting to FITS — a more widely supported format — usually resolves this. FITS is a widely used file format.
Is it safe to convert XWD to FITS online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting XWD to FITS?
Converting XWD to FITS maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my XWD file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert XWD to FITS on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.