SRT vs VTT: Which Subtitle Format Should You Use?

What Are Subtitle File Formats?

Subtitle files are simple text files that pair spoken dialogue with timestamps. When a video player reads a subtitle file, it knows exactly when to display each line of text on screen. The two most common formats are SRT (SubRip Subtitle) and VTT (Web Video Text Tracks), and while they do the same fundamental job, there are important differences that affect which one you should choose.

Understanding the SRT Format

SRT is the oldest and most widely supported subtitle format. Created for the SubRip software in the late 1990s, it has become the de facto standard for video subtitles. An SRT file contains numbered subtitle entries, each with a timestamp range and the text to display.

A typical SRT entry looks like this:

1
00:00:01,500 --> 00:00:04,000
Hello and welcome to this video.

2
00:00:04,500 --> 00:00:07,200
Today we are going to talk about subtitles.

Key characteristics of SRT:

• Uses commas as decimal separators in timestamps (00:00:01,500)
• Supports basic HTML-like formatting (bold, italic, underline)
• No support for positioning, colors, or advanced styling
• Universally supported by video editors, media players, and social platforms

Understanding the VTT Format

WebVTT (Web Video Text Tracks) was developed by the W3C specifically for HTML5 video. It is the native subtitle format for the web and is required by the HTML5 <track> element. VTT builds on SRT's foundation but adds features designed for modern web use.

A typical VTT file looks like this:

WEBVTT

00:00:01.500 --> 00:00:04.000
Hello and welcome to this video.

00:00:04.500 --> 00:00:07.200
Today we are going to talk about subtitles.

Key characteristics of VTT:

• Requires the WEBVTT header at the top of the file
• Uses periods as decimal separators (00:00:01.500)
• Supports CSS styling, positioning, and colors
• Allows metadata and chapter markers
• Subtitle numbering is optional
• Native format for web browsers and HTML5 video

Key Differences Between SRT and VTT

While both formats carry the same core information — text and timing — the differences matter depending on where your subtitles will be used:

• Decimal separator: SRT uses commas (1,500), VTT uses periods (1.500). This is the most common source of errors when manually converting between formats.
• Header: VTT requires "WEBVTT" as the first line. SRT has no header.
• Styling: VTT supports CSS-based styling including font colors, positioning on screen, and text alignment. SRT supports only basic bold/italic/underline tags.
• Compatibility: SRT works everywhere — every video editor, media player, and upload platform accepts it. VTT is the standard for web but is not always supported by desktop video editors or social media platforms.
• Metadata: VTT can include notes, comments, and chapter information. SRT is purely subtitles.

When to Use SRT

Choose SRT when you are:

• Uploading subtitles to YouTube, TikTok, Instagram, or other social platforms
• Editing video in Premiere Pro, Final Cut, DaVinci Resolve, or CapCut
• Sharing subtitle files with collaborators who use different software
• Working with any platform where you are not sure which formats are accepted

SRT is the safe, universal choice. When in doubt, use SRT.

When to Use VTT

Choose VTT when you are:

• Embedding subtitles on a website using HTML5 video
• Building a web application that plays video
• Needing advanced styling like colored text or specific positioning
• Working with web-based video platforms that specifically require VTT

How Captain Transcribe Handles Both Formats

Captain Transcribe exports subtitles in both SRT and VTT formats, so you never have to worry about choosing the wrong one. After transcribing your video, you can download whichever format your workflow requires — or grab both.

The platform also offers a plain text export for cases where you just need the transcript without any timing information, which is useful for blog posts, show notes, or accessibility documentation.

Whether you are posting to TikTok (use SRT), embedding video on your website (use VTT), or editing in Premiere Pro (use SRT), Captain Transcribe has you covered with a single transcription that exports to any format you need.