Enforce a house style without retyping anything. Rewrap every cue to a maximum line length and number of lines, breaking only at word boundaries, and see which cues are still too long to fit.
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Rewraps every cue to a maximum line length and a maximum number of lines, breaking only at word boundaries. It shows you which cues actually changed, side by side, and flags any that still will not fit.
Captions arrive as one long line per cue and your player wraps them somewhere unfortunate. A client has a house style of thirty-two characters over two lines. Or a file mixes conventions because three different people worked on it.
A cue that needs more lines than you allow is still wrapped and kept, not trimmed. Losing caption text is worse than breaking a style rule, so those cues are listed for you to shorten or split by hand. The tool will not silently delete words to satisfy a setting.