IndexTTS
Don’t want to install IndexTTS? Drop the file here.
The first 20 minutes of any recording are transcribed free: a recording up to 20 minutes transcribes in full, a longer one is previewed, and a pack from $6 (500 minutes) transcribes the rest and opens every export, and credits never expire.
Bilibili's open-source TTS — Chinese + English bilingual.
Best for chinese-market developers needing bilingual TTS with zero-shot cloning. Pricing: free (Apache-2.0 code, custom weight license).
What it is
IndexTTS is Bilibili's open-source TTS model — strong Mandarin support with zero-shot voice cloning. Apache-2.0 code; weights under a separate license. Consent posture: open weights — operator-side enforcement.
Watch out for: Code is Apache-2.0 but weights have a separate license; mainly Chinese + English coverage.
Install / use
git clone https://github.com/index-tts/index-ttsWhat people actually do with IndexTTS-style transcription
The tool is the means. These are the jobs — each one priced at published rates, each one wired up on its own page.
Features
| Speaker diarization | No |
| Word-level timestamps | No |
| Streaming / real-time | No |
| Languages supported | 2 |
| HIPAA eligible | No |
Links
IndexTTS vs Whipscribe
| Feature | IndexTTS | Whipscribe |
|---|---|---|
| Category | Open source | Transcription APIs |
| Pricing | free (Apache-2.0 code, custom weight license) | $6–$24 one-time packs (credits never expire) · first 20 minutes free |
| Speaker identification | — | Named in the summary, key quotes and chapters |
| Word timestamps | — | Yes |
| Streaming | — | No |
| Languages | 2 | 99 |
| Platforms | Linux | Web, API, MCP |
Alternatives to IndexTTS
Frequently asked about IndexTTS
Is IndexTTS free?
Yes. IndexTTS is free and open source (free (Apache-2.0 code, custom weight license)).
Does IndexTTS work on Mac, Windows and Linux?
IndexTTS runs on Linux. It is not listed for other platforms; check the vendor for anything beyond Linux.
How do I install IndexTTS?
Clone and run it from source: `git clone https://github.com/index-tts/index-tts`. Expect to install its dependencies yourself — the README has the exact steps per OS.
How many languages does IndexTTS support?
IndexTTS lists 2 languages.
Does IndexTTS identify different speakers?
No. IndexTTS does not label speakers; a conversation comes back as one continuous text. If you need speaker labels, that is a separate tool or a different service.
Does IndexTTS give word-level timestamps?
No — IndexTTS produces segment or sentence timing only, so subtitle cues can land mid-word.
Can IndexTTS transcribe live audio?
No — IndexTTS works on finished files, not a live stream.
Is IndexTTS HIPAA compliant?
IndexTTS does not claim HIPAA compliance. For PHI, run it on infrastructure you control or choose a service that will sign a BAA.
What are the limitations of IndexTTS?
Code is Apache-2.0 but weights have a separate license; mainly Chinese + English coverage.
Who is IndexTTS best for?
Chinese-market developers needing bilingual TTS with zero-shot cloning.
Does IndexTTS run offline?
IndexTTS runs on your own machine — it is open source, so nothing leaves the computer unless you configure it to.
Can I use IndexTTS in the browser?
No — IndexTTS is a Linux application, not a web app. You install it rather than sign in to it.
Where is the IndexTTS source code?
On GitHub at github.com/index-tts/index-tts. It is maintained by Bilibili.
What kind of tool is IndexTTS?
In this directory IndexTTS is filed under tts, voice clone as a open-source tool.
What are the alternatives to IndexTTS?
There is a side-by-side page at /tools/indextts-alternatives comparing IndexTTS with the closest tools in the same category on price, platform and features.
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