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Convertto

Subtitle Converter

Convert between SRT, WebVTT, ASS/SSA, MicroDVD and plain text.

Subtitle formats differ in small but breaking ways: SRT uses a comma before milliseconds and numbers each cue, WebVTT uses a dot and requires a WEBVTT header, and ASS carries styling in a script header. This converter parses all of them into a common model and writes any of them back out.

Runs in your browser
Formats
SRT, WebVTT, ASS/SSA and MicroDVD in; SRT, WebVTT, ASS and plain text out
Runs locally
Subtitle files are parsed in your browser and never uploaded
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Why will my SRT file not work in an HTML5 video?

Browsers only accept WebVTT in a <track> element. The formats are nearly identical, but VTT needs the WEBVTT header line and a dot rather than a comma before the milliseconds — renaming the file is not enough.

Does converting lose the styling?

Converting from ASS to SRT does, because SRT has no styling model beyond basic italic and bold tags. Positioning, fonts and colours are dropped. Converting between SRT and VTT loses nothing.

How to use the subtitle converter

  1. 1Enter or paste your subtitle file.
  2. 2Choose the convert to.
  3. 3Turn "Renumber cues sequentially" on or off as needed.
  4. 4Turn "Remove styling tags" on or off as needed.
  5. 5The result appears immediately — copy or download it.

Embed this tool

Put the working subtitle converter on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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