Convert jxl to fits

Converted on your device. Files never leave this tab.

Drop jxl files here or click to choose

Convert to

Nothing is uploaded

The converter runs inside this page. Cut your network after it loads and it still works.

No account, no daily limit

No sign-up, no daily limit, no watermark, no queue behind other people's files. Batch as many JXL files as you like.

Real FITS output

Encoded by magick, the same library the command-line tools use — not a renamed extension.

Other jxl conversions png jpg webp gif bmp tiff ico avif jp2 psd tga pcx

Convert to fits from png jpg webp gif bmp tiff ico avif jp2 psd tga pcx

About JXL

JPEG XL

An image format standardized as ISO/IEC 18181 in 2022, with lossy and lossless modes, HDR and alpha. It can repack an existing JPG losslessly into a file about 20 percent smaller. Use it for archiving photos or for apps that support it; browser support is limited, so check before using it on the web.

About FITS

Flexible Image Transport System

The standard data format in astronomy since 1981, storing images and tables behind plain-text headers that record telescope and observation details. Convert from FITS to get a viewable PNG or JPG of telescope data; convert to it for astronomy software.