This feature is available with some paid plans
Bitly's CSV bulk shortening is a way to create many short links from a single file. Learn how to do it at How do I shorten links in bulk?
Bulk link shortening is available with some paid plans, and the number of links that can be shortened in a single file varies by plan. Check our pricing page for details.
With our Enterprise plan, you can also upload a file to create links with the Campaigns feature. Check out our guide on the differences between Campaigns and bulk link shortening.