Details: File format summary

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Properties

Summary
Name	Web Video Text Tracks (WebVTT) Format
Version
Other names
Identifiers	PUID: fmt/1454 MIME: text/vtt
Family
Classification	Text (Structured)
Disclosure
Description	WebVTT files are used for captioning or subtitling video content. It is a standard created by the World Wide Web Consortium (W3C) for displaying timed text, and is linked to the HTML5 <track> element. The primary purpose of WebVTT files is to add text overlays to a video. Each time interval is specified in the format (HH:)mm:ss.xxx --> (HH:)mm:ss:xxx e.g. 00:00.000 --> 00:02.310 or 01:00:05.000 --> 01:00:07.000. The (HH:) is optional, but if included must have a minimum of 2 digits representing the hour (more than 2 digits may be used), and where both the minute (mm) and second (ss) parts must be between 00 and 59 inclusive.
Orientation
Byte order
Related file formats	None.
Technical Environment
Released
Supported until
Format Risk
Developed by	W3C / W3C
Supported by	W3C / W3C
Source	LIBNOVA / LIBNOVA
Source date	16 Nov 2020
Source description
Last updated	13 Mar 2023
Note	https://www.w3.org/TR/webvtt1/ https://developer.mozilla.org/en-US/docs/Web/API/WebVTT_API https://www.iana.org/assignments/media-types/text/vtt