Convert fits to ico

Converted on your device. Files never leave this tab.

Drop fits 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 FITS files as you like.

Real ICO output

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

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

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

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.

About ICO

Windows Icon

The Windows icon format, which packs several sizes of the same image, such as 16x16 and 32x32 pixels, into one file. Each size is stored as a bitmap or a PNG. Convert to ICO to make a favicon or a Windows application icon.