FITS File Viewer Online
Open and preview .fits files (FITS Astronomy Data) directly in your browser — no downloads, no installs, no account required.
Open FITS File Now →About FITS Files
| Extension | .fits |
| Full Name | FITS Astronomy Data |
| MIME Type | application/fits |
| Category | 🔬 Scientific |
| Processing | 🔒 In-browser (private) |
Software That Creates FITS Files
- DS9 (SAOImage)
- Aladin Sky Atlas
- AstroImageJ
- IRAF
- Python astropy
Who Uses FITS Files?
- Astronomers
- Astrophysicists
- Space researchers
- Observatory teams
How to Open FITS Files Online
- Visit ViewAnyFile.app
Go to ViewAnyFile.app in any web browser.
- Upload your FITS file
Drag and drop your
.fitsfile, or click to browse. - View instantly
Your file renders immediately. It stays in your browser — nothing is uploaded.
Frequently Asked Questions
How do I open a FITS file online?
Visit ViewAnyFile.app and drag your .fits file into the upload area. It renders instantly — no download or account needed.
Is it safe to open FITS files on ViewAnyFile.app?
Yes. All processing for FITS files happens entirely inside your browser. Your files never leave your device and are never uploaded to any server.
Can I open FITS files on Mac and mobile?
Yes. ViewAnyFile.app works in any modern browser on Windows, macOS, Linux, iPhone (Safari), and Android (Chrome). No operating system restrictions.
Do I need to create an account?
No. ViewAnyFile.app is 100% free with no signup required. Just drag, drop, and view.