Convert a WebVTT subtitle file to YouTube's own legacy SBV format locally in your browser. No upload.
Running locally on your device ...
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
WebVTT (.vtt) is the subtitle format of the modern web and often comes from online video players or subtitle editors. A classic YouTube upload workflow or an older third-party tool, however, occasionally still expects the YouTube-native SBV format. This tool converts a .vtt file to SBV.
The difference lies mainly in the line format: WebVTT starts with the WEBVTT marker line and separates start and end time with a "-->" arrow; SBV writes both times comma-separated on one line, with no marker line and no index. The tool reads every WebVTT subtitle and writes the timings and text back out in SBV's line format.
Any positioning or style hints a WebVTT file may additionally carry are lost during conversion, since SBV has no place for them - plain timings and text, however, are fully preserved. The conversion runs entirely locally in your browser.
| Input formats | VTT |
|---|---|
| Output format | SBV |
| Batch processing | No |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: Timings and text are carried over. WebVTT positioning hints, regions and style blocks are not carried over, since SBV has no equivalent for them. The tool converts, it does not translate into another language.
No, the conversion runs entirely locally in your browser.
A classic YouTube upload workflow or an older third-party tool sometimes still expects the SubViewer format instead of WebVTT.
Yes, SBV has no concept of positioning - timings and text are fully preserved, however.
Yes, there is the tool "Convert SRT to SBV"; for the reverse direction from SBV to SRT there is "Convert SBV to SRT".