SRT vs. VTT Subtitle Formats

Differences, use cases, and when to convert

What Are Subtitle Files?

Subtitle files contain timed text that is displayed over video. They're used for accessibility, translation, and content distribution. Two of the most common formats are SRT and VTT.

SRT (SubRip Subtitle)

SRT is the oldest and most widely supported subtitle format. It has a simple structure:

1
00:00:01,000 --> 00:00:04,000
Hello, welcome to Votilo Tools.

2
00:00:05,000 --> 00:00:08,000
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Each entry has: a sequence number, a timecode range (using commas for milliseconds), and the subtitle text.

Best for: Video players, media players (VLC, etc.), video editing software, distribution platforms like YouTube and Vimeo.

VTT (Web Video Text Tracks)

VTT is the web standard format, defined by the W3C. It's similar to SRT but adds support for styling, positioning, and metadata:

WEBVTT

00:00:01.000 --> 00:00:04.000
Hello, welcome to Votilo Tools.

00:00:05.000 --> 00:00:08.000
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Key differences from SRT: starts with "WEBVTT" header, uses periods (not commas) for milliseconds, supports cue settings for position and alignment.

Best for: HTML5 video (the <track> element only accepts VTT), web-based video players, streaming platforms.

Which to Use?

For web use, prefer VTT. For everything else (media players, editing software, video platforms that accept both), SRT is safer for maximum compatibility. When in doubt, keep both versions.

A subtitle converter tool is planned for a future Votilo Tools release.