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What Are Captions? Definition, Types, and Examples
Captions are timed text displayed on video that shows spoken dialogue, sound effects, and speaker identification, designed for viewers who cannot hear the audio.
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By Sumit DeyUpdated
Captions, Explained
Captions are a form of synchronized timed text shown on video. Unlike subtitles, which assume the viewer can hear and only translates language, captions are written for audiences who cannot hear the audio. They include spoken dialogue, speaker identification (e.g. 'JOHN:' or '[Narrator]'), and non-verbal audio cues such as '[door slams]', '[laughter]', or '[music playing]'. Captions exist in two technical forms: closed captions, which the viewer can toggle on or off, and open captions, which are permanently burned into the video. On social platforms like TikTok, Instagram Reels, and YouTube Shorts, the term 'captions' is also used to describe stylized animated word-level text designed to boost engagement and retention. These stylistic captions often display 1-3 words at a time and animate in sync with speech.
Captions Examples
- A movie playing in a noisy gym with text overlays showing what characters say.
- An Instagram Reel where each word appears in time with the creator's voice (word-level captions).
- A YouTube documentary with '[ominous music]' shown when no one is speaking.
- A news broadcast with a black bar at the bottom transcribing the anchor's words in real time.
Terms Related to Captions
Why Captions Matter
Beyond accessibility, captions significantly improve video performance: much mobile social video is watched with the sound off, and captioned videos tend to hold viewers longer. They also help search: YouTube and Google can read caption text, which helps a video show up for more searches. On social platforms, captions keep the viewer oriented in the first seconds, when most people decide whether to keep watching. For short-form video, caption every clip you post, keep lines to a few words, and place them where the platform buttons will not cover them. For long-form YouTube, add a subtitle file as well, so viewers can switch captions on in the language they want.
Captions, answered
How do I add captions to a video?
Upload the video to a caption tool, let it transcribe the speech with timing for every word, fix any words it misheard, pick a style and export. On social media, burn the captions into the video so they show on every platform.
What's the difference between captions and subtitles?
Captions assume the viewer cannot hear and include sound effects, music cues, and speaker labels. Subtitles assume the viewer can hear and only translate spoken language into text.
Are captions required by law?
In many jurisdictions, broadcast television and major online video platforms are required to provide captions under accessibility laws (e.g. the ADA and Section 508 in the U.S., the EAA in the EU). Social media platforms encourage but do not require them.
What is the standard caption file format?
The two most common caption file formats are SRT (SubRip) and VTT (WebVTT). SRT is simpler and more widely supported; VTT supports styling and positioning.
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