Caption Build
TikTok, Reels and Shorts captions

Word-by-word TikTok captions that hold attention.

On TikTok, Instagram Reels and YouTube Shorts, a large share of videos is watched with the sound off. Captions that follow the voice word by word keep your message readable, and people watch longer. Caption Build generates and times them automatically.

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Why word-by-word captions

Short-form video set its own caption style: few words on screen, big text in the middle, and the spoken word highlighted at the exact moment it's said. The eye follows the voice, even with the sound off.

For that to work, timing has to be right down to the word. A caption a quarter of a second late is instantly noticeable.

Caption a TikTok video in three steps

  • Import your video: Whisper transcribes it on your computer and syncs every word to the voice.
  • Fix and style: correct a misheard word, move its timing on the timeline, pick the active-word style and highlight key words.
  • Export: a vertical 9:16 video with burned-in captions, no watermark, ready to post.

Styles made for short-form video

All the short-form caption codes, adjustable word by word:

  • Active word as karaoke, colored pill, color or bold.
  • Word entrances: pop, rise, zoom, blur or flip.
  • Looks for key words: neon, sticker, marker, gradient, two-tone.
  • Continuous effects on a word: wave, glitch, flicker.
  • Embedded open fonts, outline, shadow, background and text position.

One tool for TikTok, Reels and Shorts

The vertical 9:16 format is the same on all three platforms. You can also export in 1:1, 4:5 or 16:9 if you repost in another format.

Frequently asked questions

Aren't TikTok's built-in auto captions enough?

TikTok's built-in captions are handy, but their style is limited and they don't follow your video to Reels or Shorts. With burned-in captions, you pick the style and your video looks the same everywhere.

How long does it take to caption a video?

Transcription is automatic; how long it takes depends on your computer and the mode you pick (fast or accurate). The rest is proofreading: fixing the few misheard words, without retyping anything.

Is Caption Build available?

It's in development. Join the waitlist to try the beta for free as soon as it opens.

Your next TikToks, captioned in minutes.

Join the waitlist to try Caption Build for free during the beta.

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