About the Lexile Text Analyzer Source Code and Products

The Lexile® Text Analyzer source code is designed to evaluate the reading demand, or complexity, of text items. This process is referred to as measuring, and the result is a text measure that represents the difficulty of analyzed text. The Lexile Analyzer measures text by evaluating the entire piece and its characteristics, such as sentence length and word frequency, which represent the syntactic and semantic challenges that a text presents to a reader. The outcome is the reading difficulty, expressed as a Lexile measure, along with the Word Count, Mean Sentence Length, Mean Log Frequency, and Early Reading Indicators for texts 650L and below.

Users can access the Lexile Analyzer source code via four product offerings: LEXILE ANALYZER API, LEXILE ANALYZER Professional, LEXILE ANALYZER Spanish, and LEXILE ANALYZER Editor Assistant. Each product reports the same metrics but differs in how they are offered (web tool or API) and features (ex: searchable history).