What is the HLC file format?
A file with the .HLC extension is a file known as ESO MIDAS Help Command. It belongs to the Misc Files category. This format is associated with European Southern Observatory.
The reliable way to open a .HLC file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .HLC files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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