Isabella
Grade C Kokoro🇬🇧 British English · ♀ Female Voice
About the Isabella Voice
Isabella is a female British English AI voice rated C on the OfflineTTS quality scale. Speech synthesis runs in your browser with no signup or per-character fees.
Best for: General voice-over
How to use the Isabella voice:
- Open the [TTS tool](/app/?voice=bf_isabella)
- "Isabella" will be automatically selected in the voice picker
- Type or paste your text (up to 50,000 characters per batch)
- Click generate — speech is created locally on your device
- Download as studio-quality WAV or compact MP3
Quality rating explained: C indicates this voice provides clear, intelligible output suitable for drafts and rapid prototyping.
The Isabella voice uses Kokoro's browser phonemizer and local WebGPU or WebAssembly synthesis. After the initial model download, English generation works completely offline.
Explore other British English voices or browse the [complete voice library](/voice/) for your project.
Best For: General voice-over
Isabella is a reliable female British English voice suitable for general voice-over, narration, and content creation.
Generate speech with Isabella now →Related Voices
Isabella Voice — Frequently Asked Questions
Is the Isabella voice free to use?
Yes. The Isabella voice is completely free. It runs in your browser with no API key, no signup, and no subscription limits. Generate as much speech as you need at zero cost.
Does the Isabella voice work offline?
Yes. After the initial model download is cached in your browser, the Isabella voice can generate speech completely offline without internet connectivity.
What quality rating does the Isabella voice have?
The Isabella voice is rated C on our quality scale. This is a solid, clear voice that produces intelligible and natural speech for content creation.
Can I export WAV and MP3 with Isabella?
Yes. After generating speech with Isabella, you can download uncompressed 24kHz WAV files for studio editing or compressed MP3 files for sharing and publishing.
Can I use the Isabella voice for commercial projects?
Yes. The models used on OfflineTTS support commercial content creation. You can use generated audio in YouTube videos, podcasts, audiobooks, and commercial voice-overs.
Ready to use Isabella?
Experience natural British English speech synthesis in your browser with zero setup or character fees.
Open Isabella Voice in TTS Studio →