Get elasticsearch's indices names - and names only

Hi there.
I know that in order to get all indices I need to use: GET /_cat/indices?v
But then I get response body that contains alot of information that I don't need (like index size) and I'm having trouble parsing the data (because the response body is in string format and not JSON )
Is there an easy way to get the indices names only, or filter them from the original response?

GET _cat/indices?h=index

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