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SBV to VTT Converter

Convert YouTube SubViewer (SBV) subtitles to WebVTT (VTT) for free, right in your browser. No upload, no sign-up.

How it works

  1. 1

    Drop one or more files into the box above.

  2. 2

    Pick the output format (already chosen on dedicated pages).

  3. 3

    Download each file or everything as a ZIP. Nothing is uploaded.

About the formats

SBV is the simple caption format YouTube Studio exports: start and end time on one line, then the text.

VTT (WebVTT) is the web standard used by HTML5 video, YouTube and most streaming players. It looks like SRT with a WEBVTT header and dots in timestamps.

Frequently asked questions

Is SBV to VTT Converter free?

Yes. Every tool on FastSub AI is free, with no sign-up, no watermark and no usage limits.

Are my files uploaded anywhere?

No. Your files are read and processed inside your browser tab. The only downloads are the app itself and, for AI tools, the model files.

Which subtitle formats are supported?

SRT, WebVTT, ASS/SSA, SBV, SUB (MicroDVD), SAMI, TTML/DFXP, LRC and CapCut projects in; all of those plus TXT, CSV, JSON, FCPXML, Word and PDF out.

Is there a file size limit?

Subtitle files up to 20 MB and videos up to several GB, limited only by your device's memory.

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