AI Caption Generator
Add animated, word-by-word captions to any video automatically. Upload a clip, the AI transcribes it and burns on trendy styled subtitles, the kind that boost retention on TikTok, Reels and Shorts. No manual timing, no editing software.
Add captions to your video
Upload a video, pick a caption style, and let the AI do the timing. You can fine-tune everything in the editor after.
Upload your video
Caption style
Cost: 2 credits
Sign in to generate. Free credits included on signup.
Captions added automatically. No editing.
How the caption generator works
Upload your video
Drop in any clip you want captioned, an MP4, MOV or WebM. It can be footage you filmed, a talking head, a podcast clip or an AI-generated video.
AI transcribes it word by word
The AI transcribes the audio and matches every caption to the exact moment it is spoken, word by word. It auto-detects the language, so there is nothing to configure.
Pick a style and download
Choose from animated caption styles, then download the captioned video. Want to tweak the wording, colors or timing? Open it in the editor and fine-tune.
Why creators use this video caption generator
Automatic transcription
The AI listens to your video and writes out every line for you. No typing the words yourself, no scrubbing the timeline to line them up.
Animated, word-highlight styles
Not static subtitles. Each word pops as it is spoken, the retention-boosting style you see on top TikTok, Reels and Shorts creators.
Auto-detects the language
English, Spanish, French, German, Portuguese and many more are detected automatically and captioned in the right language.
Works on any video
This is not limited to AI-generated content. Caption anything you upload: your own footage, interviews, clips, gameplay or webinars.
No manual timing
The hardest part of captioning is the sync. The AI handles it, so captions land on the exact word every time.
Ready in about a minute
Upload, pick a style, and get a captioned video back fast. Then post it anywhere or keep refining in the editor.
Who the AI caption generator is for
Short-form creators
Add the caption style that keeps viewers watching to TikToks, Reels and Shorts in seconds.
Faceless and clip channels
Caption repurposed clips and faceless videos at scale without touching an editing timeline.
Podcasters and interviewers
Turn long talking clips into captioned shorts so people can watch on mute and still follow along.
Educators and marketers
Add clear captions to explainers, ads and course clips to lift retention and accessibility.
Why creators use this instead of captioning by hand
| StoryShort | Doing it yourself | |
|---|---|---|
| Transcription | AI transcribes the whole video for you | Type out every line by hand |
| Timing | Synced to the exact word automatically | Drag each caption to line it up |
| Style | Animated, word-highlight caption styles | Plain static subtitles |
| Languages | Auto-detected and captioned | Set the language manually |
| Software | Nothing to install, runs in the browser | A paid editor and a learning curve |
| Time per video | About a minute | 20 to 40 minutes |
What is an AI caption generator?
An AI caption generator is a tool that adds subtitles to a video automatically. Instead of typing out every line and dragging each one to line up with the audio, you upload a clip and the AI transcribes the speech, times it word by word, and burns styled captions straight onto the video.
StoryShort's video caption generator is built for short form. It matches captions to the audio word by word and renders them in animated, word-highlight styles, the kind that keep viewers watching on TikTok, Reels and Shorts. It auto-detects the language, so the same tool captions English, Spanish, French, German, Portuguese and more without any setup.
Because most social video is watched on mute, captions are one of the highest-leverage things you can add to a clip. This works on any video, not just AI-generated ones, so you can caption your own footage, interviews, podcast clips and gameplay, then fine-tune the wording, colors and timing in the editor before you post.
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Captions on any video, automatically
Upload a clip and let AI handle the transcription, the timing and the animated caption styles so you can post captioned video every day.
Synced word by word
The AI transcribes your video and lands each caption on the exact word it is spoken, no manual timing.
The styles that perform
Animated, word-highlight captions in the styles top creators use to hold attention on TikTok, Reels and Shorts.
Frequently Asked Questions
What is an AI caption generator?
It is a tool that adds subtitles to a video automatically. The AI transcribes the audio, matches each caption to the moment it is spoken word by word, and burns styled captions onto the video, so you never type or time anything yourself.
How accurate is the transcription?
Very accurate on clear audio. The AI uses a strong speech-to-text model, so captions closely match what is said. If you ever want to tweak a word, you can edit the text before you download.
What languages are supported?
The generator auto-detects the language of your video and supports many, including English, Spanish, French, German, Portuguese and more. There is nothing to set, upload the clip and it captions it in the right language.
Can I customize the caption style?
Yes. Pick from a range of animated caption styles before you generate, then open the result in the editor to adjust the font, colors, size, position and wording so it matches your brand.
Do captions actually help with views and retention?
Yes. Most social video is watched with the sound off, so captions let people follow along on mute. Animated, word-by-word captions in particular are shown to hold attention through the first few seconds, where most viewers drop off.
Is it free?
You get free credits when you sign up, so you can caption your first videos at no cost. Generating a captioned video uses credits, which are included on the paid plans.
Add captions to your video in about a minute
Upload a clip, pick a style, and get animated captions synced word by word. Free to start, no editing software.
Add captions to your video