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SRT is the lingua franca of subtitles. Every media player supports it, every streaming platform can import it, and every subtitle editor can work with it. The format is almost offensively simple: a sequence number, a timestamp range, the subtitle text, and a blank line. You can create one in Notepad.
That simplicity is both its strength and limitation. SRT handles basic subtitles perfectly — dialogue, translations, closed captions. It does not handle styling, positioning, fonts, colours, or animation. If you need italic text or subtitles that appear at the top of the screen, SRT technically supports some HTML-like tags (`<i>`, `<b>`) but support varies by player.
For watching videos with subtitles, name the .srt file the same as the video file and place them in the same folder. Most media players (VLC, MPV, Plex) will auto-detect and load the subtitles. For streaming platforms, SRT is usually the required import format for user-uploaded captions.