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AI Auto Translate

How to use AI to translate your captions

Caption your video, then let AI Auto Translate convert the subtitles into another language — keeping the original timing so every line still lands on the right moment. Review the wording, export, done. On your iPhone, three videos a day free.

Add captions free Try it in your browser
supported languages listed in the app Timing preserved Processed on device

The short version: caption a video in Just Captions, open AI Auto Translate, and pick a target language. The app translates every caption line and keeps the original timing, so the new subtitles stay perfectly in sync. Skim the translation for names and idioms, then export a burned-in MP4 in the new language.

Step by step

Translate captions in four steps

  1. Caption the video firstAdd your clip and let Just Captions transcribe and time the subtitles in the original spoken language.
  2. Choose a target languageOpen AI Auto Translate, pick the language you want, and the app translates every caption line for you — re-using the timing it already has.
  3. Review the wordingSkim the translation for names, brand terms and idioms, and tap any line to adjust it so it reads naturally and fits on screen.
  4. Export the translated cutExport an MP4 with the translated captions burned in, on the same timing as the original — ready to post in that market.
Posting in several markets? Repeat with a new target language each time — see how to turn one video into multiple language cuts.
Get a clean translation

What to check before you export

AI does the heavy lifting. A 30-second review on these few things makes the translation feel native.

CheckWhy it matters
Names & brandsKeep proper nouns as-is — they shouldn't be translated literally
Idioms & slangSwap word-for-word phrases for the natural local equivalent
Line lengthSome languages run longer — keep it to one or two readable lines
Numbers & unitsConfirm date, currency and measurement formats fit the market
ToneMatch the formality your audience expects in that language
TimingAlready preserved from the original — no need to re-sync

Starting from a clean transcript helps the translation too — correct the original with AI before you translate.

AI Auto Translate in Just Captions

  • Translates every line from your finished captions
  • Re-uses the original timing — stays in sync
  • Edit any line before you export
  • Burned-in result posts anywhere, no toggling

Translating in a separate app

  • Copy-paste captions out and back in
  • Re-align timing by hand after pasting
  • Easy to lose styling and placement
  • More steps for every extra language
FAQ

AI caption translation, answered

How does AI Auto Translate work?
You caption a video first, then pick a target language. AI Auto Translate converts each finished caption line into that language and re-uses the original timing, so the translated subtitles appear at the same moments as the speech.
Does translation keep the captions in sync?
Yes. Translation works from your timed captions, so each translated line stays on the same moment. You only review the wording, not the timing.
Should I check the AI translation before posting?
A quick skim is worth it. AI handles the bulk well, but it helps to confirm names, brand terms and idioms, and to make sure longer phrases still fit comfortably on one or two lines.
Is translating captions free and on device?
AI translation sends caption text for online processing and needs internet. Free and Pro usage allowances are shown in the app; the free video allowance does not mean unlimited AI translation.
Keep going

More with Just Captions

Localize into multiple languagesOne video, a cut for every market.Read →
Fix transcriptions with AIClean the original before you translate.Read →
Free online subtitle toolCaption a clip in your browser, no install.Try it →

Translate your captions. In a tap.

Three videos a day free, no card, on-device transcription available. Caption once and let AI take it into any language you post in.

Download on theApp Store

Just Captions 2.6: three videos a day free, with a watermark. Choose from 15 styles: seven static styles are free; animated styles require Pro, with one free single-video Emoji export. Pro removes the watermark. On-device transcription is available after the model download. Optional cloud recognition sends audio for processing; AI editing and translation send caption text. These online features need a connection.