HOW TO USE
How to use Kotonia
Voice AI, image and video generation — all from your browser.
This page is a work in progress. Detailed demo videos and step-by-step guides will be added over time.
Three main scenarios
Talk with a character
Pick a character you like, speak into your mic, and the AI replies with voice. Great for language practice or casual conversation.
Try voice chat →Create images with AI
Describe the picture you want in words, and AI generates a high-quality image for you. Useful for social media thumbnails, character illustrations, and document visuals.
Try image generation →Create videos with AI
Turn a single image into a short video. Make a character speak with lip-sync, or create eye-catching scenes for short-form content.
Try video generation →Frequently asked questions
Is it free to use?
Yes, the main features are free to try. If you want faster generation or access to some advanced features, paid plans are available. See the pricing page for details.
Which languages are supported?
Voice supports 10 languages. The interface can be switched between Japanese, English, and Chinese.
Can I use my own voice?
Yes — with about 3 seconds of audio you can create an AI voice similar to yours. You can also design a custom voice by describing how it should sound in text.
Is there an API?
For now, Kotonia is available through your browser only. If you need a custom integration, please get in touch and we'll discuss case by case.