Readability.ch

What Readability.ch is

Readability.ch is a web tool for examining how easy text may be to read. It applies the Flesch formula and other indexes; its English page lists Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, and LIX. Alongside those scores, it counts words, sentences, syllables, and unique words, and calculates words per sentence and syllables per word. Sentence coloring marks passages as easy, medium, or hard. The site is available in German, English, French, Italian, Spanish, and Dutch. The makers say calculations run in the browser and text is not sent to or stored on a server. Once the page has loaded, analysis can also work offline. Users can pass text through a URL’s text query parameter, though the page says direct links are for short texts. It recommends at least 30 words for more reliable results. The makers caution that the indexes do not account for meaning or context, do not specifically assess technical terms, and cannot replace human editing. The site describes the project as useful to editors, copywriters, and translators.

Who it suits

It may suit editors, copywriters, and translators who want readability scores and sentence-level feedback in a browser. It is also useful for people who want to analyze text without sending it to a server, as described by its makers.

Getting started

1. Open https://readability.ch/en/ in a web browser.
2. Enter text for analysis; the site recommends at least 30 words for more reliable results.
3. Review the readability indexes, text statistics, sentence colors, and clarity recommendations.
4. After the page has loaded once, use it offline if needed.
5. Share a short text with a URL using the text query parameter.

Verdict

Readability.ch combines several readability scores with basic text statistics and sentence coloring, and offers browser-based analysis that can continue offline after loading. Treat its results as a guide rather than a substitute for editing, particularly for contextual or technical material.