Shift Subtitle Timing

Play the video and pause on a line you can clearly identify, such as the first spoken sentence. Note the time the subtitle appears and the time the words are actually spoken. The difference is your offset: if the subtitle shows at 0:12 but the line is spoken at 0:14, shift by +2 seconds. If subtitles are early and late by different amounts at the start and the end of the film, the problem is framerate drift rather than a constant delay — use the Sync Subtitles tool instead.

Sometimes a file is in sync up to a point and then jumps, typically because a scene was cut or a commercial break was removed from one version of the video. Tick “Only shift part of the file” and enter a start and/or end time. Only cues that begin inside that range are moved; everything else stays put. You can apply several partial shifts by running the tool on the downloaded result again.

Every selected cue gets the same offset added to its start and end time, so durations never change. Times that would become negative are clamped to zero. The output keeps the original format, formatting tags and text; the only change is the timing. Because the parser is tolerant, files with broken numbering or odd line endings can be shifted without first repairing them — the warnings tell you what was normalised.