Generated illustration for Kumo, a Japanese male Kokoro voice

Kumo

Grade C- Kokoro

🇯🇵 Japanese · ♂ Male Voice

Listen to natural sample audio
Use Kumo Voice in TTS →

About the Kumo Voice

Kumo is a male Japanese 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 purpose

How to use the Kumo voice:

  • Open the [TTS tool](/app/?voice=jm_kumo)
  • "Kumo" 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.

Non-English Kokoro voices use the lightweight OfflineTTS phonemization service for pronunciation tokens, followed by local WebGPU/WASM waveform generation on your device.

Explore other Japanese voices or browse the [complete voice library](/voice/) for your project.

Best For: General purpose

Kumo is a reliable male Japanese voice suitable for general voice-over, narration, and content creation.

Generate speech with Kumo now →

Related Voices

🇯🇵 Alpha C+

Japanese · female
🇯🇵 Gongitsune C

Japanese · female
🇯🇵 Nezumi C-

Japanese · female
🇯🇵 Tebukuro C

Japanese · female

Kumo Voice — Frequently Asked Questions

Is the Kumo voice free to use?

Yes. The Kumo 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 Kumo voice work offline?

Audio synthesis for Kumo runs on your device. Non-English Kokoro voices use the lightweight OfflineTTS phonemization service before local waveform synthesis.

What quality rating does the Kumo voice have?

The Kumo 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 Kumo?

Yes. After generating speech with Kumo, you can download uncompressed 24kHz WAV files for studio editing or compressed MP3 files for sharing and publishing.

Can I use the Kumo 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 Kumo?

Experience natural Japanese speech synthesis in your browser with zero setup or character fees.

Open Kumo Voice in TTS Studio →