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LRCSONG

Format guide

WebVTT (Web Video Text Tracks)

The W3C web-native subtitle format used by HTML5 <video>. SRT's modern, browser-friendly cousin.

  • .vtt
  • text/vtt
  • Free · runs in your browser
Validate a VTT file Generate synced lyrics

What is VTT?

WebVTT is the official W3C standard for HTML5 <track> elements. It looks similar to SRT but uses a `WEBVTT` header, periods (not commas) as decimal separators, and supports cue settings (position, alignment, line), regions, NOTE comments, and styling via inline ::cue rules. This is the format YouTube, Vimeo, JW Player and every browser-based player consume internally.

Common use cases

  • HTML5 <video> caption tracks
  • HLS / DASH adaptive streaming sidecar tracks
  • Browser-rendered captions on bespoke players

Example file

A minimal, valid .vtt file

WEBVTT

00:00:12.340 --> 00:00:18.910
First caption line

00:00:18.920 --> 00:00:24.500 line:80%
Second caption line

VTT compared with the other formats

Which format to reach for is really a question of what it can carry. Every value here is read off the same parsers this site's converters run on.

Feature support across the LRC, SRT, VTT, ASS and TTML subtitle formats
FeatureLRCSRTVTTASSTTML
End time per cueWhether a cue says when it stops, or simply runs until the next one begins.
Word-level timingPer-word timestamps for true karaoke highlighting.
Styling & positioningNamed styles, layers and on-screen placement carried in the file itself.
File-level tagsTitle, artist and album stored in the file rather than alongside it.
Cue identifiersA handle for each cue, useful when diffing or re-syncing.numberedoptionaloptional
Timestamp precisionThe smallest time step the format can express.centisecondsmillisecondsmillisecondscentisecondsmilliseconds

Free VTT tools

Validate VTTCheck syntax, timing order and structure instantly.View VTTRender every cue with timestamps, in your browser.Convert VTT → LRCThe de-facto standard for synced song lyrics. Plain text with [mm:ss.xx] timestamps.Convert VTT → SRTThe most widely supported subtitle format on the planet. Plain numbered cues with start→end timestamps.Convert VTT → ASSThe format anime, fansubs and karaoke scripts use when SRT can't keep up. Full styling, positioning and effects.Convert VTT → TTMLThe XML-based broadcast standard used by Netflix, Apple Music lyrics and SMPTE-compliant pipelines.

VTT questions

What is a VTT file?

The W3C web-native subtitle format used by HTML5 <video>. SRT's modern, browser-friendly cousin.

How do I convert VTT to another subtitle or lyric format?

Use LrcSong's free in-browser converters to turn VTT into LRC, SRT, VTT, ASS, or TTML. No signup or upload — conversion runs entirely on your device with timestamps preserved.

Is the VTT viewer and validator free?

Yes. Viewing and validating VTT files on LrcSong is free and runs in your browser — no account required.

Other formats

LRC format guideSRT format guideASS format guideTTML format guide