kokoro-js

What it is

Kokoro.js is a high-quality text-to-speech library designed specifically for web applications, offering developers an easy way to integrate speech synthesis capabilities into their projects under the permissive Apache-2.0 license.

Kokoro.js stands out as an open-source, high-quality text-to-speech library specifically tailored for web applications, offering developers a free and easy way to integrate speech synthesis capabilities.

When it fits — and when it doesn’t

Known weaknesses

Each one links to the public issue, changelog or docs page it came from, where we have one.

1. 01

   Limited language support

   Kokoro.js primarily supports English and lacks robust support for other languages, limiting its global applicability.

2. 02

   Performance issues with complex text inputs

   The library can struggle with long or complex sentences, leading to slower synthesis times and sometimes less natural speech output.

3. 03

   Sparse community support and documentation

   The official documentation is minimal, and the community around Kokoro.js is small, making it difficult for developers to find help or resources.

4. 04

   Dependency on specific web browser features

   Kokoro.js relies heavily on Web Audio API which may not be fully supported in all browsers, leading to inconsistent performance across different platforms.

What it does well

• High-quality speech synthesis for web applications

• Open-source under Apache-2.0 license

• Easy integration into web projects

Pricing

Free tier

YesOpen source — free to use

Paid from

$0

Model

Flat rate

Enterprise plan

No

Pricing not independently confirmed — check the vendor’s page.