If you download it from here yes: https://github.com/avahowell/sia-coldstorage/releases . Check you are downloading it from the repository of avahowell and not anyone else's cloned software (otherwise it could be a scam aimed to steal your funds). Ava Howell is a former core developer member, so it is a trustable.

I am just curious, in order to detect potential scams (as sia-coldsrtorage is a tool only known by very advanced users): where did you learnt about it? Can you share the link your read about it and which download link it you found?