CaptionStack
Private by design

VTT CONVERTER

WebVTT files.
Any format.

Convert .vtt captions to SRT, VTT, TTML, and more — or convert anything to .vtt. Free, private, and in your browser.

SRTVTTSBVLRCTTMLJSONCSVTXT
1

Choose your caption file

We’ll detect the format automatically. Drop several files to convert them all at once.

Don’t have a file handy?
2

Choose an output format

Select what you need on the other side.

100% privateYour files never leave this device.
8 formatsBuilt for the caption formats you use.
No limitsConvert as often as you need.

About WebVTT (.vtt) files

WebVTT is the native caption format for the HTML5 <track> element and for most web players, including Video.js, Plyr, and HLS streams. It looks similar to SRT but requires a WEBVTT header, uses a period before the milliseconds, and supports optional cue identifiers, positioning settings, and styling.

Where .vtt is used

  • HTML5 <video> <track> elements
  • HLS and DASH streaming manifests
  • Vimeo, Wistia, and most web video platforms

What a .vtt file looks like

WEBVTT

00:00:01.000 --> 00:00:04.200
Caption files, meet your new converter.

What converts and what doesn’t

Cue identifiers are preserved when the source has them. Positioning and styling settings are not carried from other formats, and VTT NOTE, STYLE, and REGION blocks are skipped on import.

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All caption formats