Best Readability Checkers in 2026
Updated
In short: Text Inspector is ranked #1 of 25 as of 3 October 2026, ahead of TextGears and Hemingway Editor. The best-ranked option with a free plan is TextGears. The lowest first paid tier on this page is Hemingway Editor at $0.69/mo.
25 readability checkers ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
| # | Platform | Score | Why | From | Free plan | Paid from | Readability formulas | |
|---|---|---|---|---|---|---|---|---|
| 1 |  Text Inspector | 8.4 | RecognisedAPIDocumented | Free | Yes | — | 3 formulas | View |
| 2 | TextGears | 8.1 | RecognisedAPIDocumented | $2.48/mo | Yes | 2.48 /mo | — | View |
| 3 | Hemingway Editor | 7.3 | RecognisedAPIDocumented | $0.69/mo | Yes | — | — | View |
| 4 | ProWritingAid | 7.3 | RecognisedAPIDocumented | $30/mo | Yes | 10 /mo | — | View |
| 5 | Check Readability | 7.2 | RecognisedAPIDocumented | Free | Yes | — | 9 formulas | View |
| 6 | Readability Formulas | 7.0 | RecognisedAPIDocumented | Free | Yes | — | — | View |
| 7 | Eclipse Readability Studio | 6.9 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 8 | Slick Write | 6.6 | RecognisedAPIDocumented | Free | Yes | — | — | View |
| 9 | Readable | 6.5 | RecognisedAPIDocumented | $12/mo | No | 12 /mo | 17 formulas | View |
| 10 | ApyHub Readability Scores Documents API | 6.5 | RecognisedAPIDocumented | — | Yes | 16 /mo | 2 formulas | View |
| 11 |  Readability Analysis Tool (RAT) | 6.4 | RecognisedAPIDocumented | — | Yes | — | 2 formulas | View |
| 12 |  Data·yze Readability Analyzer | 6.1 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 13 |  Flesch-Kincaid Calculator | 6.0 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 14 |  ReadabilityTool | 6.0 | RecognisedAPIDocumented | — | Yes | — | 6 formulas | View |
| 15 | DO101 Readability Checker | 5.9 | RecognisedAPIDocumented | — | Yes | — | 6 formulas | View |
| 16 |  Analyze My Writing | 5.7 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 17 |  Readability.ch | 5.7 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 18 | AnchorKite Readability Checker | 5.7 | RecognisedAPIDocumented | — | Yes | — | 6 formulas | View |
| 19 | Delimiter Readability Checker | 5.6 | RecognisedAPIDocumented | — | Yes | — | 3 formulas | View |
| 20 |  Flesch-Kincaid Readability & Grade Level Analyzer | 5.5 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 21 |  ATOS Analyzer | 5.4 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 22 |  Botoi Readability API | 5.4 | RecognisedAPIDocumented | — | Yes | 9 /mo | 3 formulas | View |
| 23 |  UsingEnglish Text Analyser | 5.0 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 24 |  StyleWriter | 4.9 | RecognisedAPIDocumented | $90/mo | No | — | — | View |
| 25 |  Orwellix | 4.6 | RecognisedAPIDocumented | — | No | 19.83 /mo | — | View |
Is your platform 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 readability checker is ranked first on Inferse?
Text Inspector is ranked #1 of 25 with a score of 8.4. TextGears is second and Hemingway Editor third.
How many of these have a free plan?
6 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, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it. Paid placements never change a rank.