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Closed Captions vs Subtitles: What Actually Differs

Closed Captions vs Subtitles: What Actually Differs

Editor compares caption tracks on a video player

Closed captions are text for viewers who can’t hear the audio. They carry dialogue plus the sounds that matter, and the viewer can switch them on or off. Subtitles are text for viewers who can hear but don’t understand the language, so they usually translate the dialogue and nothing else. In the US the two terms mean different things. In much of the rest of the world they are used interchangeably, and that is where most of the confusion starts.

This guide covers the difference, the open versus closed question, how each type is delivered as a file, and how to decide which one a given video needs.

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TL;DR

  • Captions transcribe speech and meaningful non-speech audio (music, sound effects, speaker changes) for people who can’t hear it. Subtitles usually cover spoken words only, often translated.
  • Closed means the viewer can toggle the text. Open means it is burned into the picture and always visible. Open and closed describe delivery, not content.
  • In the US, subtitles alone don’t meet accessibility standards for synchronized media. SDH (subtitles for the deaf and hard of hearing) bridges the gap.
  • Default to closed captions for web delivery. Use open captions when a platform can’t toggle text or you need exact control over placement.
  • Keep captions and subtitles as separate, versioned files so each language and each cut stays traceable.

Table of Contents

The short version: who each one is for

The cleanest way to separate them is to ask what the viewer can’t do. The W3C Web Accessibility Initiative defines captions as text that carries speech and non-speech audio information needed to understand the content, while subtitles usually contain only the spoken audio, typically translated for people who can hear but don’t know the language.

Closed captions (CC) Subtitles
Main audience Deaf and hard-of-hearing viewers, plus anyone watching without sound Viewers who can hear but don’t speak the language
Dialogue Yes, usually same language as the audio Yes, often translated
Sound effects and music cues Yes Usually no
Speaker identification Yes, when it isn’t obvious Rarely
Viewer can toggle Yes Depends on delivery
Primary purpose Accessibility Language access

Accessibility is the driver behind captions. Language is the driver behind subtitles. If you remember only one thing, remember that.

What captions include that subtitles leave out

Watch a thriller with subtitles only and you get every line of dialogue. You miss the door slamming off-screen, the tense score that shifts, the voice that says something from another room. Captions put those into text, usually in brackets: [door slams], [ominous music], [phone buzzing].

The typical caption track covers:

  • Dialogue, verbatim or lightly edited
  • Speaker labels when the speaker is off-screen or ambiguous
  • Sound effects that affect the story
  • Music descriptions or song titles
  • Tone cues when delivery changes meaning, such as [sarcastically]

There is a hybrid. The Described and Captioned Media Program (DCMP) explains that SDH are like subtitles but include sound effects, speaker identification and other nonspeech features. You see SDH on streaming services and discs when a title offers a same-language or translated track that also covers non-speech sounds. If you need a translated version that still serves deaf and hard-of-hearing audiences, SDH is the format to ask for.

Why the terms get mixed up

The wording is regional. In North America, captions and subtitles are separate things. In the UK and many other countries, “subtitles” is the catch-all word for on-screen text of any kind, including what Americans call closed captions. The W3C notes that the definitions are distinct in North America but the terms are often interchangeable elsewhere.

That matters when you work with international clients. A UK broadcaster who asks for “subtitles” may mean full accessibility text with sound descriptions. A US client who asks for “subtitles” on a corporate video may mean a translation. Before anyone starts work, confirm three things in writing: the language, whether non-speech audio is included, and whether the text must be toggleable.

Three checks for caption and subtitle delivery

You may also see “CC” on a player button. It simply stands for closed captions. The icon appears on a player when a caption track is available.

Open captions vs closed captions

This is the second distinction readers trip over. It has nothing to do with content. It is about delivery.

  • Closed captions are separate from the picture. The viewer turns them on or off. The FADGI audiovisual accessibility guidelines say they are called closed because they can be turned on or off in a media viewer, provided the viewer supports it.
  • Open captions are burned into the video frames. Everyone sees them and nobody can turn them off.

The same logic answers a common question about open versus closed subtitles. There is no standard split between the two. Subtitles, like captions, can be delivered either way. A translated subtitle track can be a toggleable file or be burned into the picture for a festival screening.

How closed captions are stored

Historically, analog US television carried closed caption data on line 21 of the vertical blanking interval, as DCMP describes. Today you mostly meet them as digital data. FADGI notes that closed caption data can be stored in sidecar files such as .vtt or .srt, or embedded in the digital video. That flexibility is useful, but it means you have to know what each destination wants. Our comparison of SRT vs VTT and the roundup of subtitle file formats for delivery walk through the choices.

If you want a plain-language overview of how text tracks sit alongside video in a production and distribution pipeline, this overview of content formats is a good companion.

When open captions make sense

The University of South Carolina’s accessibility office points out that open captions give editors control over the placement and style of the text, while closed captions depend on the player’s support and may not work on every social platform. That gives you a practical rule set:

  1. The platform can’t toggle text. Some social feeds, in-store screens and event displays only play a flat video. Burn the text in.
  2. Physical constraints. Public displays, muted lobby TVs and conference loops can’t offer a button. FADGI lists this as a standard use for open captions.
  3. Design control. If a campaign spot needs the text positioned around a logo or lower third, burning it in guarantees the result.
  4. Silent autoplay. Short social cuts that start muted benefit from text that is always there.

When closed captions are the better default

The University of Chicago’s digital accessibility center advises that closed captions are generally preferable because viewers get more control over display and assistive technology can read them. Viewers can resize, recolor or turn off the text. Captions can be searched, indexed and edited later without re-exporting the video. You can add languages without rendering a new master.

For most web, streaming and internal delivery, ship a closed caption file and keep an open-captioned version only for the places that need it.

Do the US rules treat them differently?

Yes, and this is where choosing wrongly can cost you.

Section 508 guidance, summarized in the FADGI document, says subtitles are not an acceptable way to conform with synchronized media standards in the United States because they lack the description of non-speech audio. If a federal agency, a university or a contractor needs accessible video, a translation-only subtitle track won’t do. You need captions or SDH.

Broadcast and online rules add another layer. Under FCC requirements, video programming providers must offer closed captions for new programs with English or Spanish audio, with certain exemptions. The FCC’s consumer guide adds that the internet captioning rules apply only when the programming was shown on US television with captions, and that captioned TV programs must be captioned when re-shown online. If your team produces content that airs and then streams, the caption file you deliver to the broadcaster needs to survive into the online version.

Web accessibility is a wider topic than captions. For the site-level side of it, this rundown of US website accessibility fixes covers what to check around your embedded video.

This is general information about requirements, not legal advice. If a contract or a regulator specifies a standard, confirm it with the client’s counsel or accessibility lead.

Quality: automatic captions are a draft, not a deliverable

Speech recognition has made first-pass captions fast. It hasn’t made them final. Microsoft’s globalization guidance notes that automatic speech-to-text captions are often lower quality than professionally created ones, even though they’re common in many systems.

The practical workflow most teams settle on is: generate a draft automatically, then have a person correct names, jargon, speaker labels and non-speech cues. Machines are weakest at exactly the things that separate captions from subtitles, such as describing a sound or noting that a speaker is off-screen. Our guide to an auto captions workflow shows how to review a machine draft without redoing it from scratch.

If you only need the raw words from a clip that has no caption track yet, these ways to get a transcript without captions show how to pull one from a YouTube video.

Readability: the editorial side

Whether the text is a caption or a subtitle, it has to be readable. The BBC Academy stresses that good text needs an editorial balance: readable, well timed and positioned so it doesn’t hide important parts of the picture.

Practical habits that follow from that:

  • Break lines at natural phrase boundaries, not mid-clause.
  • Keep to two lines on screen where possible.
  • Time each cue to appear with the speech and clear before the next shot if you can.
  • Move text up when a lower third, graphic or burned-in name tag would collide with it.
  • Use consistent styling. DCMP notes that subtitles typically use a black rim or drop shadow so they stay visible over changing backgrounds.

For house rules on font, size, margins and line breaks, see our subtitle styling guidelines for production teams.

How to choose: a quick decision path

Work through these questions in order.

  1. Does anyone in the audience need to access the audio through text? If yes, you need captions or SDH, not plain subtitles.
  2. Is the audience watching in another language? Add subtitles per language. If those viewers also include deaf or hard-of-hearing people, deliver them as SDH.
  3. Can the platform toggle text? If yes, deliver a closed caption file. If not, produce an open-captioned version.
  4. Is exact placement or branding critical? Burn in the text for that cut and keep a clean, caption-free master.
  5. Is there a regulatory or contractual standard? Match it before anything else.

As the University of South Carolina puts it, the choice between open and closed depends on your video and where you want to publish it.

Video discovery is a separate benefit. Text tracks give search engines something to read, and this guide to optimizing videos for SEO explains where captions fit in that picture. Treat that as a bonus. Accessibility is the reason you caption.

Delivery scenarios production teams run into

A branded web series. Deliver a clean master, a closed caption sidecar per language, and an open-captioned square cut for social feeds.

A corporate training video for a US university. Captions are the requirement, so deliver an English closed caption file with sound cues. Add translated subtitles later if the audience needs them.

A film festival submission in a foreign language. The festival may ask for burned-in English subtitles or a separate file. Check the submission specs, because each venue differs.

An episodic show headed for TV and streaming. Plan for broadcast-compliant captions first, then derive web files from them so the content stays identical.

In each case the pain isn’t writing the text. It’s tracking which file belongs to which cut, which language is approved, and who signed off. That is a workflow problem.

Keeping caption and subtitle files under control

A single project can end up with an English caption file, a Spanish SDH file, French subtitles, an open-captioned social cut and several revisions of each. If they live in email threads and shared folders, someone eventually ships the wrong one.

A reliable routine looks like this:

Perspective

We see the same mistake on production teams again and again: captions and subtitles get treated as one task at the end of the schedule, then handled by whoever has time. The result is a translation track delivered where a captioned track was required, or an open-captioned export sent where the client needed a toggleable file.

Our view is that text tracks deserve the same version discipline as picture. A caption file is a deliverable with a language, a type, a version and an approver. When the client can see those files next to the cut they belong to, comment on them at exact timecodes and approve them in the same place, the wrong-file mistakes mostly disappear.

That is why we built Posthive around client ownership of deliverables and versions. Review, task tracking, transcription and translation workflows, and secure delivery sit in one workspace, so a caption revision doesn’t depend on someone remembering which email had the latest SRT.

Lorenz

Run caption and subtitle delivery in one workspace

Posthive is a cloud post-production workspace for creative teams, agencies, freelancers and production companies. It brings version control, task and deadline tracking, collaborative review, transcription and translation workflows, client approval tracking and secure media delivery into one place. Every plan includes unlimited free seats, so clients and teammates can review without per-editor fees. See Posthive plans: Pro is $49 per month and Enterprise is $99 per month.

Posthive

If your team is still passing caption files around by email, start with the Posthive workspace and keep every version, language and approval next to the cut it belongs to.

FAQ

Is CC better than subtitles?

They solve different problems, so neither is better across the board. If a viewer needs the audio in text form, captions are the right choice because they include sound effects and speaker cues. If the viewer hears the audio but doesn’t speak the language, subtitles do the job. For accessibility in the US, captions or SDH are the standard to meet.

Should closed captions be on or off when I’m using subtitles?

Turn on only one text track at a time. Showing both stacks two blocks of text and hides the picture. Pick captions if you need the sound descriptions. Pick subtitles if you only need a translation. If a title offers an SDH track, that single track often covers both needs.

Why are they called closed captions?

The name refers to the text being hidden until the viewer activates it. FADGI describes closed captions as text that can be turned on or off in a media viewer that supports it. Open captions are the opposite, because they are part of the picture.

How do I turn on closed captions?

Look for the CC button or a settings menu in the video player, then choose a caption track. On TVs and streaming devices, the option is usually under accessibility or subtitle settings. If no button appears, the video probably has no closed caption track, or it has open captions that can’t be removed.

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