AI subtitles that keep muted viewers watching to the end
Most people watch Shorts on mute. FastClip reads your video's audio, transcribes every word, and burns in animated karaoke captions that pop in time with the speaker. MrBeast, CapCut and Hormozi styles, 20+ languages, all editable in your browser. No timing by hand, no separate captions app.
Why creators choose FastClip
Muted viewers read instead of scrolling past
A huge share of short-form gets watched with the sound off. A clip with no captions is a clip nobody finishes. FastClip puts the words on screen, animated and synced to the voice, so a scrolling viewer can follow your point with zero audio and stay to the end. The caption is the hook that buys you the watch time.
Word-by-word karaoke captions, not a flat block of text
Static subtitles sit there. Animated captions move with the speaker, highlighting each word as it's said, so the eye keeps following the line. FastClip generates this karaoke-style animation automatically from the transcription. You pick the look: bold MrBeast pop, clean CapCut, punchy Hormozi. It's the same caption style the top creators pay separate apps for, built into the clip.
Auto-generated from the audio, in the right language
FastClip transcribes the actual spoken audio with AI, so the captions match what's really being said, not auto-uploaded YouTube text. It detects the video's language and writes the captions in it, across 20+ languages, with accents, names and slang intact. You get accurate, on-brand captions without typing or syncing a single line.
How it works
Paste a link, get clips. About a minute from long video to a batch of vertical Shorts.
Paste your video link
Drop in a YouTube URL or a long video. FastClip's AI finds the best moments and cuts them into up to 10 vertical 9:16 Shorts. There's nothing to configure for captions, they're part of the run.
Captions are written automatically from the audio
As it clips, FastClip transcribes the speech word-by-word and lays animated karaoke captions over every Short, timed to the voice. It detects the language and writes the captions in it, so the text is on screen and in sync before you even open the editor.
Tweak the style and download in 1080p
Open any clip in the browser editor to switch caption style (MrBeast, CapCut, Hormozi), fix a word, or move the captions up or down. Then export 1080p 9:16, ready for TikTok, Reels and YouTube Shorts.
Frequently asked questions
What languages do the AI subtitles support?
FastClip transcribes the spoken audio and writes captions in over 20 languages. It detects the language of your video automatically and generates the captions in that same language, keeping accents, names and slang intact, so you don't pick a language manually or end up with mismatched text.
How accurate are the captions, and can I fix mistakes?
Captions come from an AI transcription of the actual audio, so they track what's really being said far better than auto-uploaded platform text. Nothing is perfect with fast speech or heavy slang, which is why every clip opens in a browser editor where you can correct a word, the text, the style or the position before you export.
What caption styles can I use?
FastClip ships with animated karaoke styles inspired by how top creators caption: a bold MrBeast-style pop, a clean CapCut look, and a punchy Hormozi style. Captions highlight word-by-word in time with the speaker. You can switch styles per clip in the editor until the look fits your channel.
Do I need a separate captions app like Captions or Submagic?
No. The whole point is that the subtitles are part of the clipping flow. FastClip finds the best moments, cuts them to 9:16, and adds the animated captions in the same pass, so you go from one long video to a batch of captioned Shorts without exporting into a second app. You can start free, no card, with 1 video and 5 downloads.
Built for every kind of creator
One AI clipping tool for all your long-form. Or start from the AI YouTube to Shorts generator.
Your captions are already written
Paste a link and FastClip hands you vertical Shorts with animated, word-by-word captions in about a minute, transcribed straight from your audio in your language. Tweak the style in the browser, download in 1080p, post. Start free, no credit card.