For me is more easy using API Rest (https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issue-fields/#api-rest-api-3-field-post).
From a CSV file I never created custom field.
Hi @Charan goud
I don't think this can be done (happy to be corrected), but can I ask why this needs to be done via a CSV file?
Presumably the file (seeing they are all single-line text fields) only has one, possibly two columns "Name" and "Description". So other than saving a bit of time loading via some kind of import process, what is the advantage of CSV over loading directly into Jira?