legible.es

What It Is

Legible is an online readability analysis tool for castellano/Spanish text. Users can paste or type in text, or enter a URL, then click analyze to see whether the text is easy to read. It is not a general-purpose enterprise content platform; it is closer to a lightweight language analysis tool.

Core Features

Its core value lies in using multiple readability formulas that have been validated for Spanish, including Fernández Huerta, Gutiérrez de Polini, Crawford, Szigriszt-Pazos, Inflesz, and legibilidad µ. The page explains its basic assumption: shorter words and shorter sentences usually make a text easier to understand. In addition to readability scores and explanations, it also counts word frequency, lists unrecognized words, ranks letters by frequency, and estimates reading time. Note that it does not evaluate fonts, layout, or visual presentation.

Pricing and Deployment

The main page does not mention commercial plans, subscription pricing, or payment methods. The tool appears to be directly usable online, and the program is a Python script released under the GPL 3 license, with source code available to view and download on GitHub. This makes it cost-effective for individual users and technical teams, and it also leaves room for self-hosting or secondary development. However, the page does not provide deployment documentation, API documentation, or enterprise support information.

Pros and Cons

Its strengths are its focus on Spanish, clearly sourced algorithms, straightforward functionality, and open-source transparency. It is suitable for initial optimization of SEO copy, educational materials, public-facing explanatory text, and web content. The drawbacks are also clear: it lacks team collaboration, permission management, batch workflows, third-party integrations, security and compliance information, and an SLA. It is not sufficient for enterprise-level content governance. At the same time, it mainly serves Spanish-language contexts and is not suitable for analyzing Chinese content.

Who It’s For and Access from China

Legible is suitable for Spanish-language writers, editors, SEO practitioners, educators, and organizations that want to make their text easier to understand. Access from China cannot be determined from the available text and would require real-world testing; payment is not covered either. If you need a more mature commercial SaaS, you could compare it with Readable, Hemingway Editor, or the readability features in Yoast SEO, or build an internal tool based on its open-source script.