How the AI transcribes and captions your video
AI captioning isn't just turning audio into text. There are four jobs: recognize the speech, mark the exact time of each word, group words into chunks that fit the screen, and decide what deserves emphasis. If any one fails, captions come out desynced, with chunks too long or emphasis on the wrong word.
Clipa does all four. Transcription comes with per-word timing (not per sentence), chunking respects pauses and punctuation to form 3-to-5-word blocks, and the AI marks impact words with color. The result opens in the editor already finished — it's not a subtitle file for you to sync later.
Caption a video with AI in 3 steps
Upload your video
Drag the file into your browser, from desktop or mobile. Nothing to install, and no need to export from an editor first.
The AI does the work
Per-word transcription, chunks built automatically and keywords highlighted in color — all in seconds.
Review and export
Fix any word, switch styles if you like and export your captioned video at original quality, ready to post.
Accuracy is where most AI captioning slips
Real speech is harder than clean audio: fast talkers, slang, contractions and numbers spoken out loud. A generic AI returns text that's *almost* right — and every mistake shows up on screen, in big bold letters.
Per-word timing, not per sentence
Each word carries its own timestamp. That's what lets captions follow speech instead of landing in late blocks.
Spoken numbers become digits
"Twenty-three thousand" becomes "23K" automatically — the way it reads fast on screen, not the way it's spoken.
Chunks that fit the screen
Grouping respects pauses and punctuation: 3 to 5 words per block, without cutting sentences awkwardly or overflowing the frame.
You have the final word
Every transcript is editable. Fix a word and the sync stays intact — nothing else to adjust.
30+ languages, with Portuguese and Spanish at the core
Clipa was built for Brazilian creators, so Portuguese is the most finely tuned language in the system. Spanish and English come right after, with support for 30+ languages — useful for captioning content for different audiences or for clients abroad.
Where your captioned video goes
Reels and TikTok
9:16 format, captions placed away from platform UI and styles designed for the vertical feed.
YouTube Shorts
Same export, ready to publish — and burned-in captions show up even when viewers don't turn on platform subtitles.
Ads and brand content
Captions consistent with your brand: same font, same highlight color across every piece.
Frequently asked questions about AI captioning
How do I caption a video with AI?
Upload the video to Clipa in your browser: the AI transcribes speech with per-word timing, builds the caption chunks and highlights keywords. You review in the editor and export the captioned video.
How accurate is the transcription?
High — including fast speech, slang and contractions. Spoken numbers are converted to digits automatically, and anything you disagree with is editable.
Do I need to install software?
No. Everything happens in the browser, on desktop or mobile: upload, transcription, editing and export.
Can I fix the transcript?
Yes. Every word is editable in the editor, and sync with the audio is preserved after your edits.
Are captions burned into the video?
Yes, captions are rendered into the exported video — no .srt file needed and no dependency on viewers enabling platform subtitles.
How long does captioning take?
Transcription takes seconds and export usually takes around 2 minutes, depending on length and the quality you pick.
How is this different from TikTok's and Instagram's built-in captions?
Native ones are plain text with no style control and no word highlighting. In Clipa you choose font, colors, effect and animation — and captions are baked into the file, so they work on any platform.
Does it work for long videos like podcasts?
It does. Transcription works the same; for long-form, the common use is captioning the clips you post to social.