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SubFit AI translates and optimizes subtitles with timing-aware character limits for flawless multilingual SRT/VTT files.
SubFit is a browser-based AI subtitle translator that works with SRT and VTT files. It calculates a character budget per segment based on display duration, so translations fit the timing without overflow. Built-in QA checks reading speed (CPS), line length, and empty translations. The interactive editor supports virtual scrolling for 5,000+ segments, diff display, and a simulation player. Export clean SRT files or multi-language ZIP packages. Video creators waste hours on subtitle QA after translation. SubFit eliminates that step by building time constraints into the AI itself. Each segment gets a character budget, and the built-in QA panel flags anything that still needs attention. Need subtitles in 50+ languages? SubFit translates SRT and VTT files using AI that respects display time.
