Subtitles Vs Captions

title: "Subtitles vs Captions — Understanding the Difference for Accessibility" description: "Learn the difference between subtitles and captions and when to use each for accessibility compliance versus translation purposes." weight: 3 date: 2026-06-28 lastmod: 2026-06-28 tags: [accessibility, media]

Subtitles translate dialogue. Captions include dialogue plus audio information. Both serve different purposes and have different accessibility requirements.

## What You'll Learn

The difference between subtitles and captions, when to use each, and how to provide both.

## Why It Matters

Using subtitles when captions are needed fails accessibility requirements. Captions must include sound effects and speaker identification.

## Real-World Use

A training video has a door slam sound effect. Captions show "[door slams]" while subtitles would only show the translated dialogue. The deaf user needs that auditory information.

## Subtitles

```html
<!-- Subtitles for translation -->
<track kind="subtitles" src="subtitles-es.vtt"
       srclang="es" label="Spanish">

<!-- Subtitles for same language -->
<track kind="subtitles" src="subtitles-en.vtt"
       srclang="en" label="English subtitles">

Captions with Audio Information

WEBVTT

00:00:01.000 --> 00:00:04.000
[gentle piano music]

00:00:05.000 --> 00:00:08.000
NARRATOR: Welcome to the training video.

00:00:09.000 --> 00:00:12.000
[door creaks open]

00:00:12.500 --> 00:00:16.000
SPEAKER 1: Sorry I am late.

00:00:17.000 --> 00:00:20.000
[all laugh]

Common Mistakes

1. Using subtitles when captions are needed

Subtitles do not include sound effects or speaker identification required for accessibility.

2. No speaker identification

Captions should identify who is speaking when there are multiple speakers.

3. Sound effects not captioned

Important audio information (door slam, alarm, phone ringing) must be included.

4. Music not described

If music conveys mood or information, include a description like "[ominous music]."

5. Assuming subtitles are sufficient for WCAG

Only captions that include audio information satisfy WCAG 1.2.2.

Practice Questions

1. What information do captions include that subtitles do not? Sound effects, speaker identification, and music descriptions.

2. What track kind should you use for accessibility compliance? kind="captions" for accessibility. kind="subtitles" for translation only.

3. How do you indicate a sound effect in a caption? In brackets: "[phone ringing]", "[door slams]", "[applause]".

Challenge: Take a 30-second video clip and write both a subtitle file (dialogue only) and a caption file (dialogue + audio info).

FAQ

Mini Project

Write a complete caption file for a 1-minute video with dialogue, sound effects, music, and two speakers. Include all audio information.

What's Next

Learn about Audio Descriptions and how to describe visual content for blind users.