SRT vs VTT: Which Subtitle Format Should You Use?

SRT and VTT are two of the most common subtitle formats. They both describe when text should appear over a video, but they are built for slightly different environments.

SRT is simple, widely accepted, and ideal when you need a subtitle file that works almost everywhere. VTT, also called WebVTT, is designed for the web and supports extra features for browser-based players.

When SRT is the better choice

Choose SRT when compatibility matters most. It is supported by major video platforms, editing tools, media players, learning platforms, and many transcription workflows.

SRT is especially useful for:

• Uploading captions to common video platforms.
• Sending subtitle files to editors or translators.
• Keeping subtitle files small and easy to inspect.
• Converting between multiple subtitle formats.

The format is intentionally minimal, which is why it travels well between tools.

When VTT is the better choice

Choose VTT when the subtitles are mainly for a website or HTML5 video player. WebVTT starts with a WEBVTT header and can support cue settings such as positioning, alignment, and styling hints.

VTT is useful for:

• Native browser video subtitles.
• Web players that need caption positioning.
• Interactive lessons, demos, or web apps.
• Projects that need metadata cues.

If your final destination is a web page, VTT may save extra work.

Format differences

SRT timestamps use commas for milliseconds:

00:00:03,500 --> 00:00:06,000

VTT timestamps use periods:

00:00:03.500 --> 00:00:06.000

SRT blocks usually include sequence numbers. VTT cue numbers are optional, and the file begins with WEBVTT.

Which one should you export?

If you are not sure, export SRT first. It is the safest general-purpose format and can be converted to VTT later when you need web-player features.

Export VTT first when you know the file will live in a browser video workflow or the player expects WebVTT specifically.

In practice, many teams keep both: SRT for editing and platform uploads, VTT for the web experience.