Best AI Readability Checkers in 2026
Updated
In short: ToolsVale Readability Checker is ranked #1 of 25 as of 4 October 2026, ahead of Readability Formulas and A2Z Tools Plain Language Analyzer. The best-ranked option with a free plan is Readability Formulas. The lowest first paid tier on this page is Hemingway Editor at $0.69/mo.
Readability checkers help you examine how clear and accessible text may be for its intended readers. Compare readability scores and grade-level analysis with sentence complexity, and look for plain-language rewrites or accessibility guidance if those are useful for your material. Input formats can affect which text you can review, while free plan availability and paid-from pricing provide cost context. Hemingway Editor, ToolsVale Readability Checker, and eReadable are among the first entries, followed by Readability Formulas and A2Z Tools Plain Language Analyzer. Consider the kind of feedback you need and the readers you are writing for as you compare the listed measures and features.
25 AI readability checkers ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 ToolsVale Readability Checker Top pick · 7.4 Free plan · Free
#2 Readability Formulas Runner-up · 6.9 Free plan · Free
#3 A2Z Tools Plain Language Analyzer Also great · 6.8 Free plan · Free
- Free plan AndroidiOSLinuxmacOSWebWindows
- Free plan
- Yes
- Readability scores
- 7 scores
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms - Free plan extensionmacOSWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free plan Web
- Free plan
- Yes
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms - Free planFree trial apiWeb
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free plan Web
- Free plan
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms - Free plan Web
- Free plan
- Yes
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms - Free plan Web
- Free plan
- Yes
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms - Free trial macOSWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms$0.69/mofirst paid tier About Hemingway EditorVisit site - Free plan Web
- Free plan
- Yes
- Readability scores
- 6 scores
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
RecognisedDocumentedFree planPlatforms - Free trial AndroidiOSmacOSWebWindows
- Free plan
- No
- Readability scores
- 9 scores
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms$41.58/mofirst paid tier About Health Literacy AdvisorVisit site - Free trial Linuxself-hostedWebWindows
- Free plan
- No
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms - WindowsmacOSLinux
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- No
RecognisedDocumentedFree planPlatforms - Free trial apiWeb
- Free plan
- No
- Paid from
- 12 /mo
RecognisedDocumentedFree planPlatforms$12/mofirst paid tier About ReadableVisit site - Web
- Free plan
- Yes
- Paid from
- 29.99 /mo
- Readability scores
- 8 scores
- Grade-level analysis
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Readability scores
- 0 scores
- Grade-level analysis
- No
- Sentence complexity
- Yes
- Plain-language rewrites
- No
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- Yes
RecognisedDocumentedFree planPlatforms - WindowsLinux
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - WindowsmacOSLinux
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Windows
- Free plan
- No
- Readability scores
- 9 scores
- Grade-level analysis
- Yes
- Sentence complexity
- Yes
- Plain-language rewrites
- No
RecognisedDocumentedFree planPlatforms -
- Free plan
- Yes
- Readability scores
- 6 scores
- Grade-level analysis
- Yes
RecognisedDocumentedFree planPlatforms -
- Grade-level analysis
- Yes
- Plain-language rewrites
- No
RecognisedDocumentedFree planPlatforms -
- Free plan
- Yes
- Paid from
- 16 /mo
RecognisedDocumentedFree planPlatforms -
- Free plan
- Yes
- Paid from
- 9 /mo
RecognisedDocumentedFree planPlatforms
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI readability checker is ranked first on Everything Xiaomi?
ToolsVale Readability Checker is ranked #1 of 25 with a score of 7.4. Readability Formulas is second and A2Z Tools Plain Language Analyzer third.
How many of these have a free plan?
8 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Hemingway Editor has the lowest first paid tier we found: $0.69/mo.
How is this list ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.