Free Bulk FITS Image Converter Online — 25+ Formats
Drag and drop your files into this 100% free online FITS converter (image/fits, .fits, Lossless), pick a target format from 25+ options and click the Convert button to change formats in HD quality. Use the quality slider to control file size and detail, then download each result separately or grab the whole batch as a single ZIP — no signup, no downloads, and no watermark needed; your FITS files are deleted from our servers right after. Also see:ICO converter - free online.
Drop your FITS files here or click to browse
Convert FITS to WEBP, PNG, JPG, GIF, AVIF, JXL and 19+ more formats in HD quality
Choose FilesThis FITS converter supports 25+ output formats with bulk and batch processing — pick your target format directly from the dropdown above. Related:Convert PEF online.
What Is FITS Format and Why Convert It Online?
Flexible Image Transport System for astronomical data. See also:Bulk DCS conversion tool.
| Property | FITS Details |
|---|---|
| File Extension | .fits |
| MIME Type | image/fits |
| Compression Type | Lossless |
| Transparency Support | No |
| Animation Support | No |
| Metadata Support | Yes |
| Available Output Formats | 25+ formats |
- Bulk and batch conversion that lets you upload and convert multiple FITS files at once to any of 25+ supported formats
- 100% free with no signup so you can start converting FITS files instantly without creating an account
- Private and secure because all uploaded files are auto-deleted from our servers immediately after conversion