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Kokoro

Isabella (British)

Ọfụụ English Female Kokoro

Isabella (British) is a female AI voice powered by the Kokoro text-to-speech model. This free-tier voice speaks English and delivers studio-quality speech synthesis. With near-instant generation speed and a quality rating of 5/5, Isabella (British) is well-suited for high-quality tts with minimal latency, streaming applications. The Kokoro engine is developed by Hexgrad under the Apache 2.0 license, making it safe for commercial use. Key capabilities include: 82m parameters, ultra-fast, expressive voices, multilingual, streaming support.

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KokoroModel Information

Móòdù Kokoro
Developer Hexgrad
Quality
Speed Fast
License Apache 2.0
Cloning Enweghị
Tier Free (no credits)
Parameters 82M
Architecture StyleTTS + ISTFTNet
Training Data 1200 hours
Year 2024

Best Use Cases for Isabella (British)

Recommended applications based on this voice's characteristics

Audiobooks & Narration

Use Isabella (British) to narrate long-form content with natural prosody and expression.

Video Voiceovers

Add professional narration to YouTube videos, ads, and social media content.

Apps & Accessibility

Fast generation makes this voice ideal for real-time apps, screen readers, and accessibility tools.

Podcasts & Broadcasting

Studio-quality output suitable for podcasts, radio, and professional broadcasting.

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Bella

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View all Kokoro voices

Ajụjụ ndị a na-ajụkarị

Kokoro is an 82 million parameter text-to-speech model that punches well above its weight class. Despite its tiny size, it produces remarkably natural and expressive speech. Kokoro supports multiple languages including English, Japanese, Chinese, and Korean with a variety of expressive voices. It runs incredibly fast — generating audio nearly 100x faster than real-time on a GPU.

Kokoro was developed by Hexgrad and is released under the Apache 2.0 license, which permits commercial use of generated audio.

Kokoro supports 11 languages: English, Japanese, Chinese, Korean, French, German, Italian, Portuguese and more.

Kokoro is in the Free tier — free — no credits required. You can preview any Kokoro voice for free before generating full audio.

Kokoro has very fast generation speed. It runs in near real-time, making it suitable for streaming and interactive applications.

Kokoro is rated 5/5 for audio quality on TTS.ai. It delivers studio-grade, human-like speech.

No, Kokoro uses a fixed set of built-in voices. For voice cloning, try models like CosyVoice 2, GPT-SoVITS, or Chatterbox.

Yes, Kokoro is specifically recommended for high-quality tts with minimal latency, streaming applications. Its 82m parameters, ultra-fast, expressive voices capabilities make it an excellent choice for this use case.

Yes, Kokoro is licensed under Apache 2.0, which allows commercial use. Audio generated with Kokoro voices can be used in videos, podcasts, apps, games, and any other commercial project.

Yes, all voices on TTS.ai use commercially-licensed open-source models (MIT, Apache 2.0). The generated audio is yours to use in videos, podcasts, apps, games, and any other commercial application.

Send a POST request to /api/v1/tts/ with the model name and voice ID. See our API Documentation page for code examples in Python, JavaScript, Go, and cURL.

Yes, click the play button on this page to hear a sample. You can also type custom text on the Text to Speech page and generate a free preview with any voice.

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