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Upload a file, record live, paste a link, or import from your cloud, then watch it transcribe.
Captions for accessibility give viewers who cannot hear the audio a readable, time-coded record of every word, and RealtimeVoiceKIT generates them in your browser, powered by leading frontier AI from OpenAI, Anthropic, and Google. Export SRT or VTT, label speakers, and translate captions in one place.
Where captions help
Online courses
Caption lessons so every learner can follow the material.
Marketing video
Add captions so clips work with the sound off and stay accessible.
Events and talks
Provide readable captions for recorded keynotes and panels.
Social clips
Burn-ready SRT and VTT for accessible short-form video.
What's included
How to caption a video
Upload your video
Drag in the file or paste a link. No conversion needed.
Generate captions
The AI transcribes and time-codes every line for you.
Export SRT or VTT
Download captions, or translate them into another language first.
Frequently asked questions
Are accessibility captions free?
Yes. You get 10 free minutes every month with no credit card, and SRT and VTT export are included.
What caption formats can I export?
Export time-coded SRT or VTT for any player, plus plain TXT if you only need the text.
Which AI powers it?
RealtimeVoiceKIT is powered by leading frontier AI from OpenAI (ChatGPT), Anthropic (Claude), and Google (Gemini).
Can I caption in another language?
Yes. Transcribe in 100+ languages, then translate the captions before you download them.