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Subtitle Format Converter

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Convert subtitle files between SRT, WebVTT, ASS/SSA, SBV, and plain TXT — entirely in your browser, with timing and styling preserved where formats overlap.

About Subtitle Format Converter

Different platforms need different subtitle formats: SRT for desktop players and most CMSes, WebVTT for HTML5 <track> elements and YouTube uploads, ASS/SSA for advanced styling, SBV for older YouTube exports, and plain TXT for transcripts and translation pipelines. The AT USE Subtitle Converter handles every direction in this matrix. Drop a file in, pick a target format, get a clean download. Timing is preserved exactly, styling is preserved when the target format supports it (and gracefully stripped when it does not), and the converter validates each cue against the target format's rules so you never ship a broken track. Everything runs locally in your browser — your transcripts never leave your device.

Common use cases

  • Convert YouTube SBV exports into SRT for use in desktop video editors.
  • Convert SRT to WebVTT for use with HTML5 <track> elements.
  • Strip ASS styling down to plain SRT for compatibility.
  • Export a clean TXT transcript from a subtitle file.
  • Re-encode an old subtitle file into a modern format.

How to use it

  1. Drop or pick a subtitle file into the converter.
  2. Choose your target format (SRT, VTT, ASS, SBV, or TXT).
  3. Review the preview of the first cue to confirm parsing is correct.
  4. Download your converted subtitles.

Frequently asked questions

Is this tool free?

Yes. Completely free, no login, no watermark, no signup required. Everything runs in your browser.

Will it preserve styling?

Where the target format supports it, yes. ASS to ASS preserves all styling; ASS to SRT preserves the text and timing but drops styling, since SRT does not support it.

Will my files leave my browser?

No. The converter runs locally — files never upload to a server.

What about character encoding?

The converter detects the source encoding (UTF-8, UTF-16, Windows-1252, etc.) and outputs UTF-8 for maximum compatibility.

Will it support batch conversion?

Currently single-file. Paste or pick one file at a time.

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