Open vs Closed Captions: What's the Difference and Which Should You Use?

Closed captions (CC)

Closed captions are a separate text track that the viewer can turn on or off, usually with a CC button. They're delivered as a subtitle file (like SRT or VTT) or embedded in the video stream, and the video player draws them.

• Pros: viewers choose; can be translated; the text is available to the platform for search; the video stays clean.
• Cons: the player controls the look; not every platform supports caption files; viewers who never press CC never see them.

Open captions (burned-in)

Open captions are part of the picture itself. They're rendered into every frame, so they always appear, on every platform, exactly as designed.

• Pros: always visible (great for sound-off viewing); full control over fonts, colours, position and animation; works anywhere, including platforms without caption uploads.
• Cons: can't be switched off, resized or translated; fixing a typo means exporting again.

Tools like CapMagic Studio create open captions by drawing styled text onto each video frame, then exporting a new MP4.

Captions vs subtitles

In everyday speech the words are used interchangeably, but traditionally:

• Subtitles assume the viewer can hear, and show the dialogue (often translated into another language).
• Captions assume the viewer may not hear, and include dialogue plus important sounds, such as [music], [laughter] or [phone rings], and who is speaking.
• SDH (subtitles for the Deaf and hard of hearing) combine both: subtitle styling with caption-level sound information.

Which should you use?

• Short-form social video (TikTok, Reels, Shorts): open captions.
• Long-form YouTube, courses, webinars: closed captions (upload an SRT).
• Ads and silent autoplay placements: open captions.
• Maximum reach: both. Burn in stylish captions for social clips, and publish closed captions for the full-length version.

Writing good captions (whichever type you choose)

• Be accurate. Captions should match what is said. Light clean-up of filler words is fine; changing meaning isn't.
• Identify speakers when it isn't obvious who is talking, for example SARA: Let's begin..
• Include meaningful sounds such as music changes, laughter or a door slam, when they matter for understanding.
• Keep lines short and in sync, so viewers can read comfortably without missing the picture.
• Proofread names, numbers and technical terms. See the caption accuracy checklist.

Frequently asked questions