Convert ras to fits

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Drop ras files here or click to choose

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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 RAS files as you like.

Real FITS output

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

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

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

About RAS

Sun Raster

The native raster format of Sun workstations running SunOS, stored uncompressed or with run-length encoding. Convert from RAS to open images saved on old Sun systems.

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.