SRT vs VTT: Which Subtitle Format Should You Use?
A clear comparison of SRT and VTT subtitle formats — differences, platform compatibility, and when to use each one.
By PodText TeamPublished Updated
If you've ever exported subtitles or captions and been asked to choose between SRT and VTT, you've probably wondered whether it actually matters. It does — but the answer depends on where you're publishing. Here's a clear breakdown of both formats, their differences, and when to use each one.
What Is SRT?
SRT stands for SubRip Text. It's one of the oldest and most widely supported subtitle formats, originally created for the SubRip software in the early 2000s. The format is dead simple: a sequence number, a timestamp range, and the subtitle text, repeated for each caption block.
A typical SRT file looks like this:
1
00:00:01,000 --> 00:00:04,500
Welcome to the show. Today we're talking about transcription.
2
00:00:05,200 --> 00:00:08,800
Our guest has been in the audio industry for over a decade.
Note the comma separating seconds from milliseconds in the timestamp; that's SRT-specific syntax. SRT has no formal specification, no metadata, and no positioning. Many players honor a few basic tags such as <i> for italics, but support varies, so treat SRT as plain text.
What Is VTT?
VTT stands for WebVTT (Web Video Text Tracks), a W3C-specified format built for the web (W3C WebVTT). The structure is similar to SRT but with a few key differences.
A VTT file starts with the header WEBVTT, uses a period instead of a comma in timestamps, and supports optional styling and positioning:
WEBVTT
00:00:01.000 --> 00:00:04.500
Welcome to the show. Today we're talking about transcription.
00:00:05.200 --> 00:00:08.800 align:right
Our guest has been in the audio industry for over a decade.
VTT also supports cue settings (positioning, alignment, size), inline styling via CSS, and metadata cues that don't display as subtitles but can be used by JavaScript. It's a more capable format — but that capability only matters if the platform you're publishing on actually uses it.
Key Differences
Styling support. SRT has no standard styling. VTT supports cue positioning and CSS-based styling in browsers. If you need positioned or consistently styled captions on the web, use VTT.
Timestamp syntax. SRT uses commas (00:00:01,000). VTT uses periods (00:00:01.000). This is a small but important difference — many parsers are strict about it, and mixing them up will break your subtitles.
File header. VTT files must start with WEBVTT on the first line. SRT files have no header. This makes SRT slightly simpler to generate and parse manually.
Metadata and chapters. VTT supports NOTE blocks (comments) and non-displaying metadata cues. SRT doesn't. If you're building a web player that uses chapter markers or timed metadata, VTT is the right choice.
Browser support. VTT is the format the HTML5 <track> element reads (MDN). Browsers don't play SRT through <track> without a JavaScript library or a conversion step.
Platform Compatibility
| Platform | SRT | VTT | Source |
|---|---|---|---|
| YouTube | Yes | Yes | YouTube Help |
| Vimeo | Yes | Yes (recommended) | Vimeo Help |
Yes (named like video.en_US.srt) | No | Facebook Help | |
HTML5 video (<track>) | No (needs JS) | Yes | MDN |
| WordPress video block | No | Yes | WordPress docs |
| Final Cut Pro | Yes | No | Apple Support |
The pattern: SRT is the safe choice for editing software and social platforms that accept caption files, and VTT is the right choice for web players you control. Platforms like YouTube and Vimeo take both. For regular Instagram and TikTok posts, the apps generate captions themselves rather than taking an uploaded file, so burn your captions into the video if you want your own.
When to Use SRT
Use SRT when:
- You're uploading captions to Facebook
- You're working with video editing software such as Final Cut Pro, Premiere Pro, or DaVinci Resolve
- You need maximum compatibility and don't need styling
- You're distributing subtitle files to clients or collaborators who may use various tools
SRT is the safe default. If you're not sure what the platform supports, SRT will almost always work.
When to Use VTT
Use VTT when:
- You're embedding video on a website using the HTML5
<track>element - You're adding captions to a WordPress video block
- You need positioned or styled captions on the web
- You're building a custom web video player
VTT is the right choice for web-first video where you control the player.
How to Generate Both Formats with PodText
You don't have to choose up front. PodText's video-to-text tool transcribes video files and exports both SRT and VTT, along with plain text and Markdown. The same exports work for audio and podcast episodes. Upload your file, get the transcript, then download whichever format you need, or both. For the step-by-step, see how to add subtitles to your videos.
This is useful when you're publishing the same video in multiple places. Export SRT for your social media uploads and VTT for your website's embedded player, all from the same transcript.
The format question matters less than having accurate captions in the first place. Start with a clean transcript, then export to whatever format your platform needs.
Sources
Checked on 2026-09-26.
- W3C, WebVTT: The Web Video Text Tracks Format
- MDN Web Docs,
<track>: The Embed Text Track element - YouTube Help, Supported subtitle and closed caption files
- Vimeo Help Center, Troubleshooting: Caption file types
- Facebook Help Center, What is the naming convention for SubRip (.srt) files?
- WordPress Documentation, Video block
- Apple Support, Import closed captions into Final Cut Pro for Mac
