French text readability analyzer
Gauge how hard a French text is to read using the Kandel-Moles index, the French adaptation of the Flesch formula. No data is sent to a server: the analysis runs entirely in your browser.
How it works
This tool is handy for checking that a blog post, an official letter or a piece of educational writing stays accessible to its target audience before you publish it. Paste your text and click "Analyze readability" to get a score out of 100 along with detailed statistics on sentence and word length.
What is the Kandel-Moles index?
It is a French adaptation of the Flesch readability formula, developed by Liliane Kandel and Abraham Moles. It combines the average number of words per sentence and the average number of syllables per word to produce a score between 0 and 100: the higher the score, the easier the text is to read. A score above 70 generally corresponds to a text accessible to the general public, while a score below 30 signals a very technical or academic text.
How is the number of syllables estimated?
The tool counts groups of consecutive vowels in each word, which gives a good approximation of French syllable breaks, then adjusts the result to account for the silent "e" at the end of a word. It is not an exact phonetic breakdown (some cases, such as diphthongs or liaisons, are not handled), but the approximation is reliable enough to calculate an overall readability score.
The text you paste stays on your device: no analysis is sent to an external server.