Why burned-in captions instead of an uploaded caption file?

Burned-in captions render the same on every platform and cannot be switched off. Platform caption tracks vary in styling, are sometimes off by default, and are ignored by some in-feed players.

Do the captions match the voiceover exactly?

They are transcribed from the finished voiceover and then re-spelled to match the script, so names and terms come out the way you wrote them. If a word or its timing is off, fix it in the editor.

Can I change the caption style?

Yes: one of 9 styles, or your own choice of font from the 18 included, colors, highlight type and position. Keep it legible above all, since a style that is hard to read at speed costs more attention than it earns.

Do captions actually improve retention?

Many people watch short videos with the sound off or low, and a video that only works with sound loses them in the first second. In a 2019 survey of U.S. adults by Verizon Media and Publicis Media, 80% said they were more likely to watch a video to the end when captions were available.

FeatureCapabilityUpdated Oct 22, 2026

Auto Captions & Subtitles: Boost Retention with Burned-In Text

Automatically add accurate burned-in captions with karaoke-style word-by-word highlights, emojis and your brand colors. ShortFast transcribes the voiceover in more than 60 languages, detected automatically, and keeps viewers reading and watching longer on TikTok, Reels and Shorts. Pick one of 10 styles or set the font, colors, highlight and position yourself, and fix any word or its timing in the editor. Coming soon: upload your own brand font.

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What you get

Inside Auto Captions & Subtitles

Highly accurate AI transcription in 60+ languages

Karaoke-style word-by-word highlights for retention

Emojis you can add to any caption

18 fonts, your colors and positioning; your own brand font coming soon

Burned-in subtitles, no reliance on platform auto-captions

Accessible content that reaches viewers watching on mute

FAQ

Common questions

Why burned-in captions instead of an uploaded caption file?: Burned-in captions render the same on every platform and cannot be switched off. Platform caption tracks vary in styling, are sometimes off by default, and are ignored by some in-feed players.
Do the captions match the voiceover exactly?: They are transcribed from the finished voiceover and then re-spelled to match the script, so names and terms come out the way you wrote them. If a word or its timing is off, fix it in the editor.
Can I change the caption style?: Yes: one of 9 styles, or your own choice of font from the 18 included, colors, highlight type and position. Keep it legible above all, since a style that is hard to read at speed costs more attention than it earns.
Do captions actually improve retention?: Many people watch short videos with the sound off or low, and a video that only works with sound loses them in the first second. In a 2019 survey of U.S. adults by Verizon Media and Publicis Media, 80% said they were more likely to watch a video to the end when captions were available.

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Auto Captions & Subtitles: Boost Retention with Burned-In Text

Inside Auto Captions & Subtitles

Common questions

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