What is the difference between VTT and SRT files?

VTT (WebVTT) and SRT (SubRip) are both subtitle formats but differ in three key ways: (1) Timestamp separator: VTT uses a dot (00:00:01.000) while SRT uses a comma (00:00:01,000). (2) Use case: VTT is designed for web browsers and HTML5 video; SRT has broader compatibility with desktop video players. (3) Features: VTT supports cue settings for text positioning and styling; SRT is plain text only.

What does a VTT file look like?

A VTT file starts with the required 'WEBVTT' header on the first line, followed by optional metadata, then individual cue blocks. Each cue has an optional cue identifier, a timestamp line (00:00:01.000 --> 00:00:04.000), and the subtitle text. Cues are separated by blank lines.

Can I convert a VTT file to SRT?

Yes. To convert VTT to SRT: (1) Remove the WEBVTT header line. (2) Replace dot millisecond separators with commas (00:00:01.000 → 00:00:01,000). (3) Add sequence numbers to each cue block. Alternatively, download subtitles directly as SRT from YTVidHub instead of converting.

Technical Guide

What Is a VTT File? Complete WebVTT Format Guide

A .vtt file (WebVTT) is the standard subtitle format for HTML5 web video. Learn the exact timestamp syntax, how a .vtt file compares to SRT, and how to download YouTube subtitles as VTT in seconds — free.

Quick answer: A .vtt file (Web Video Text Tracks) stores subtitle cues with timestamps in the format HH:MM:SS.mmm --> HH:MM:SS.mmm. It starts with a required WEBVTT header and is natively supported by all modern web browsers via the HTML5 <track> element.

Published June 26, 2026 · YTVidHub Editorial Team

HTML5

Native Support

All modern browsers

.mmm

Milliseconds

Dot separator (not comma)

UTF-8

Encoding

Universal character support

Free

Open Standard

W3C WebVTT specification

What Is a VTT File?

A VTT file (extension .vtt) is a plain-text subtitle file following the WebVTT (Web Video Text Tracks) specification developed by the W3C. It is the native subtitle format for HTML5 <video> elements and is natively supported by Chrome, Firefox, Safari, and Edge without any plugins.

VTT files store timed cue blocks — each cue defines when subtitle text should appear and disappear on screen. Unlike SRT files, VTT supports additional features like cue positioning, vertical text, and CSS-style text formatting.

example.vttWebVTT format

WEBVTT

00:00:01.000 --> 00:00:04.000
Welcome to this tutorial.

00:00:04.500 --> 00:00:08.000
Today we'll cover three key topics.

00:00:08.200 --> 00:00:12.500
Let's start with the basics.

A minimal VTT file. The WEBVTT header is required. Timestamps use dots, not commas.

VTT vs SRT: Key Differences

VTT and SRT are both plain-text subtitle formats, but they serve different use cases. Here is a direct comparison:

Feature	VTT (WebVTT)	SRT (SubRip)
Header	Required WEBVTT line	None
Timestamp separator	Dot: 00:00:01.000	Comma: 00:00:01,000
Cue IDs	Optional (text or number)	Required (sequential number)
Browser support	Native HTML5 ✅	Requires JS library
Desktop players	VLC, most players	Universal support
Styling support	Yes (CSS, positioning)	No
Course platforms	Coursera, Udemy ✅	Less common
AI / plain text use	Strip header + timestamps	Strip timestamps

When to use VTT: Building a web video player, uploading captions to an online course platform, or working with HTML5 video. When to use SRT: Using desktop video players (VLC, Windows Media Player), video editing software, or distributing subtitle files broadly.

See the complete format comparison: SRT vs VTT — Which format should you use?

VTT File Syntax and Structure

Every valid VTT file follows this structure:

1
WEBVTT header (required)
The file must start with WEBVTT on the first line. This is mandatory — files without it will not parse correctly.
```
WEBVTT
```
2
Optional metadata block
After the WEBVTT header, you can add optional key-value metadata before the first cue.
```
Kind: subtitles
Language: en
```
3
Cue blocks
Each cue has an optional ID, a timestamp line, and the subtitle text. Cues are separated by blank lines.
```
00:00:01.000 --> 00:00:04.000
Hello and welcome.
```

Common mistake: Using a comma instead of a dot in VTT timestamps (e.g., 00:00:01,000 instead of 00:00:01.000). Commas are the SRT format — VTT always uses dots.

How to Open a VTT File

📝

Text editors

✓ Notepad (Windows)
✓ TextEdit (macOS)
✓ VS Code
✓ Sublime Text

Best for editing cue content and timestamps

🎬

Video players

✓ VLC Media Player
✓ Chrome / Firefox
✓ Safari
✓ Edge

Load via subtitle menu or HTML5 track element

🎞️

Editing software

✓ Adobe Premiere Pro
✓ DaVinci Resolve
✓ Final Cut Pro
✓ Camtasia

Import VTT for subtitle track editing

Download YouTube Subtitles as VTT — Free

Need a VTT file from a YouTube video? YTVidHub extracts subtitles in VTT format in under 10 seconds — single videos, playlists, or entire channels.

How to download in 4 steps

1Copy the YouTube video or playlist URL
2Paste it into the input field below
3Select VTT as the output format
4Click Extract — your .vtt file is ready in seconds

Download VTT Free →Bulk playlist VTT download

Free · No installation · SRT, VTT, TXT formats · 100+ languages

How to Convert VTT to SRT (and Back)

VTT → SRT

1. Remove the WEBVTT header line
2. Remove any metadata blocks
3. Add sequential numbers (1, 2, 3...) to each cue
4. Replace dots with commas in timestamps: 00:00:01.000 → 00:00:01,000
5. Save as .srt

SRT → VTT

1. Add WEBVTT as the first line
2. Remove sequence numbers (optional, VTT IDs are optional)
3. Replace commas with dots in timestamps: 00:00:01,000 → 00:00:01.000
4. Save as .vtt

Tip: The fastest way to get subtitles in the format you need is to download directly in that format from YTVidHub — no conversion step required. Choose SRT, VTT, or TXT at download time.

VTT File Use Cases

Web video players

VTT is the only subtitle format natively supported by the HTML5 <track> element. Any web-based video player that doesn't use a JS subtitle library will require VTT.

Online course platforms

Coursera, Udemy, Teachable, and most LMS platforms use VTT for closed captions. Upload VTT to add accessibility to your course videos.

Accessibility compliance

VTT is required for WCAG-compliant web video. If your website serves video content, VTT captions are needed for legal accessibility compliance in many jurisdictions.

Video editing software

Adobe Premiere Pro, DaVinci Resolve, and Final Cut Pro all support VTT subtitle track import for burn-in or overlay workflows.

YouTube subtitle download

YouTube generates auto-captions for all videos. Download them as VTT for any of the above use cases using YTVidHub — single videos or entire playlists.

AI and NLP research

VTT files (with timestamps stripped) provide clean, time-aligned text for speech recognition training, LLM fine-tuning, and NLP dataset preparation.

Frequently Asked Questions About VTT Files

Everything you need to know about the WebVTT subtitle format.

What is a VTT file?

A VTT file (WebVTT — Web Video Text Tracks) is a subtitle and caption format designed for HTML5 video. It stores timed text cues with timestamps in the format HH:MM:SS.mmm --> HH:MM:SS.mmm. Unlike SRT, VTT uses a dot as the millisecond separator and supports additional styling features like text positioning and color.

What is the difference between VTT and SRT?

VTT and SRT differ in three key ways: timestamp separator (VTT uses a dot: 00:00:01.000, SRT uses a comma: 00:00:01,000), use case (VTT is for web browsers and HTML5 video, SRT has broader desktop player support), and features (VTT supports cue positioning and styling, SRT is plain text only).

How do I open a VTT file?

Open a VTT file in any text editor — Notepad, TextEdit, or VS Code — to view or edit the content. For playback, modern web browsers natively support VTT via the HTML5 track element. VLC media player also supports VTT subtitle loading.

What is the correct VTT timestamp format?

The correct VTT timestamp format is HH:MM:SS.mmm --> HH:MM:SS.mmm. Hours are optional for timestamps under one hour. The arrow separator must have a space on each side. Milliseconds use a dot, not a comma — this is the key difference from SRT format.

How do I download YouTube subtitles as a VTT file?

Paste any YouTube video URL into YTVidHub, select VTT as the output format, and click Extract. Your VTT subtitle file will be ready in under 10 seconds. You can also download entire playlists as VTT files in bulk — no software installation required.

What is a VTT file used for?

VTT files are used for web video players (the native subtitle format for HTML5 video), online course platforms like Coursera and Udemy, accessibility and closed captions, and video editing software including Adobe Premiere and DaVinci Resolve.

Can I convert VTT to SRT?

Yes. To convert VTT to SRT: remove the WEBVTT header line, replace dot millisecond separators with commas, and add sequence numbers to each cue block. Alternatively, you can download subtitles directly in SRT format from YTVidHub to skip the conversion step entirely.

Can I download YouTube subtitles as VTT for entire playlists?

Yes. YTVidHub supports bulk VTT downloads from entire YouTube playlists and channels. Paste a playlist URL, select VTT format, and download all subtitle files as a single ZIP archive. This is the fastest way to get VTT files for multiple videos at once.

Related guides and tools

What Is an SRT File?The complete guide to the SRT subtitle format.SRT vs VTT — Format ComparisonSide-by-side comparison of both subtitle formats.YouTube VTT DownloaderDownload subtitles from any YouTube video as VTT.Bulk Subtitle DownloaderDownload VTT files from entire YouTube playlists.YouTube Transcript GeneratorConvert YouTube video to clean text without timestamps.Playlist Subtitle Download GuideStep-by-step guide to batch downloading subtitles.