What type of subtitle file is compatible with the X (previously Twitter) subtitle tool?

What The compatible file format is SRT (SubRip Subtitle), the most common timed-caption format.

How Upload your SRT with the source video, then review timing blocks and style before exporting.

Why SRT is widely accepted by social platforms, editors, and caption QA workflows.

For source file prep, use SRT Generator before returning to Add Animated Captions for X (previously Twitter).