- Why are my subtitles out of sync?
- Usually the subtitle file was made for a different cut of the video — an extra intro, a different frame rate transfer, or a trimmed release. That shifts every line by the same constant amount, which is exactly what this tool corrects.
- Does it re-encode my video?
- No. The video is only used for previewing. The tool edits the subtitle file's timestamps and gives you a corrected .srt or .vtt — your video file is untouched.
- What if the drift gets worse over time instead of being constant?
- Progressive drift means the subtitles were timed for a different frame rate. A constant shift fixes the start; if the end still drifts, the file needs retiming rather than shifting — try re-generating subtitles with our AI Transcription tool instead.
- Is my video uploaded?
- No. Everything runs locally in your browser — the video, the subtitle file, and the correction. Nothing is sent to any server.
- What subtitle formats are supported?
- SubRip (.srt) and WebVTT (.vtt), the two most common formats. The corrected file downloads in the same format you loaded.