Text Inspector analyzes English text and reports difficulty, readability, lexical diversity, and CEFR levels.
Alternatives to Etoolio Easy Read Checker
Health Literacy Advisor assesses and improves document readability using plain-language principles.
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Readable
Readable is an online toolkit for analyzing and improving writing readability and quality.
WebAPI7.0From $12 a month - 5

Hemingway Editor
Hemingway Editor helps writers assess readability by scoring text and highlighting sentences and issues that may make a message harder to understand.
WebmacOSWindows6.8 - 6

APIVerve Website Readability API
APIVerve Website Readability API analyzes a webpage and returns its readability score information, including eight scores and grade-level analysis.
Free planWebAPI6.7From $29.99 a month - 7

ToolsVale Readability Checker
ToolsVale Readability Checker evaluates pasted text or web pages for readability, crawler access, and paragraphs that may need revision.
Free planAndroidiOSWebLinux6.7Free plan - 8
ProfText
ProfText analyzes documents for vague language, patterns associated with AI-generated writing, and the validity of academic citations.
Free planWebAPI6.6From €9.99 a month - 9

ApyHub Readability Scores Documents API
ApyHub Readability Scores Documents API measures how easy a document or publicly accessible web page is to read.
Free planAPI6.5From $16 a month - 10
Botoi Readability API
Botoi Readability API analyzes English text and returns Flesch-Kincaid Grade, Flesch Reading Ease, Gunning Fog, and underlying counts.
Free planAPI6.5From $9 a month - 11
Tensetti Plain Language Checker
Tensetti Plain Language Checker is a web tool for spotting clarity issues in technical documents.
Free planWeb6.5From €120 a year - 12
Readability
Readability analyzes Markdown files and reports measures of reading difficulty.
Free planLinuxmacOSWindows6.4Free plan - 13
Oanor Readability API
Oanor Readability API scores text using six formulas: Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau, and Automated Readability Index.
Free planAPI6.3From €6.80 a month - 14

Readability Formulas
Readability Formulas provides tools for scoring English text and estimating the grade level and age of readers likely to understand it.
Free planWebExtensionmacOSWindows6.3Free plan - 15
StyleWriter
StyleWriter is Windows proofreading and editing software that adjusts writing advice to a selected audience and task.
Windows6.2$90 one-time - 16
textstat
textstat is a free, open-source Python library for measuring readability, text complexity, and grade level.
Free planLinuxSelf-hosted6.2Free plan - 17

Eclipse Readability Studio
Eclipse Readability Studio is free, open-source desktop software for examining how easily documents can be read.
Free planLinuxmacOSWindows6.1Free plan - 186.1Free plan
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Readability Analysis Tool (RAT)
Readability Analysis Tool (RAT) checks German text for readability anomalies using configurable rules, in a process likened to finding bug patterns…
Free planLinuxWindows6.1Free plan - 20

A2Z Tools Plain Language Analyzer
A2Z Tools Plain Language Analyzer checks English drafts against plain-language guidance and links findings to guideline sources.
Free planWeb6.0Free plan - 21

AI Readability
AI Readability is a free web checker for assessing how readily English text can be read by people and parsed or reused by AI systems.
Free planWeb5.9Free plan - 22

AI Readability Checker
AI Readability Checker is a free web tool for reviewing how easily AI assistants can extract content from a page or draft.
Free planWeb5.9Free plan - 23
eReadable
eReadable is a free web-based tool for checking readability and adapting text to a target reading level.
Free planWeb5.9Free plan - 24
WebFX Readability Test Tool
WebFX Readability Test Tool analyzes webpage text and reports six readability scores: Flesch Kincaid Reading Ease, Flesch Kincaid Grade Level,…
Free planWeb5.9Free plan - 25
VT Writer
VT Writer is VisibleThread’s document analysis tool within an RFP platform for proposal, capture, and contracts teams.
WebLinuxSelf-hostedWindows5.8