Lisen is a Chrome browser extension positioned as a free read-aloud tool for articles and PDFs, using Cartesia voices for text-to-speech.
Main use: According to the page title and description, Lisen can be used to read aloud any article or PDF, that is, convert web article or PDF document content into audio playback. Its highlight is that it is "free," and it emphasizes that no additional subscription fee is required beyond an existing Cartesia subscription.
How to use: This tool is provided as a Chrome extension and can be installed from the Chrome Web Store (page address:https://chromewebstore.google.com/detail/lisen-free-read-aloud-wit/jjglbebakkebkafjilbfnejmgpdphbhp）。安装后具体如何调用、是否支持划词、点击朗读、整页朗读、快捷键等操作细节，资料中暂未提供。
Data and privacy: The developer states that user data will not be sold to third parties (except for approved use cases), will not be used for or transferred to purposes unrelated to the core functionality, and will not be used for determining creditworthiness or lending purposes. The developer has not identified itself as a trader and notes to EU consumers that the contract between them and the developer does not fall under consumer rights. More detailed information on data collection and use must be found in the developer's privacy policy.
Developer and updates: The extension is provided by sudoaugustin, is in English, and was last updated on October 11, 2026.
Limitations and information not provided: The materials do not state the supported browser versions, platforms other than Chrome, the number of voices and languages, speed and pitch control, the scope of PDF parsing, whether offline use is supported, the free usage limit, or whether a Cartesia account or API key is required. The above features and usage limitations are not yet provided and cannot be confirmed.
