Best Readability Checkers in 2026
Updated
When you want to gauge how readily readers may follow a piece of writing, readability checkers offer different ways to examine text. Compare the readability formulas and sentence analysis each option lists, along with clarity recommendations for possible revisions. Language support can matter when you work across languages, while a browser extension may affect where you can check text as you write. API access is worth considering for programmatic use. ProWritingAid, Check Readability, and Readability Formulas are among the options to compare. Review free-plan availability and paid-from pricing alongside the listed capabilities to find a checker suited to your writing and workflow.
25ranked
21free plans on this page
$0.69/molowest paid tier
9 Oct 2026last checked
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 ProWritingAid No phone app RecognisedPhone appDocumentedFree plan 6.4$10/mo
- 2 ATOS Analyzer No phone app RecognisedPhone appDocumentedFree plan 6.3Free Sentence analysis: Yes
- 3 TextGears No phone app RecognisedPhone appDocumentedFree plan 6.3$2.48/mo
- 4 AnchorKite Readability Checker No phone app RecognisedPhone appDocumentedFree plan 6.2Free Readability formulas: 6 formulasSentence analysis: YesClarity recommendations: Yes
- 5 ApyHub Readability Scores Documents API No phone app RecognisedPhone appDocumentedFree plan 6.2$16/mo Readability formulas: 2 formulasSentence analysis: Yes
- 6 Botoi Readability API No phone app RecognisedPhone appDocumentedFree plan 6.2$9/mo Readability formulas: 3 formulasSentence analysis: Yes
- 7 Check Readability No phone app RecognisedPhone appDocumentedFree plan 6.2Free Readability formulas: 9 formulasSentence analysis: YesClarity recommendations: Yes
- 8 Readability Analysis Tool (RAT) No phone app RecognisedPhone appDocumentedFree plan 6.2Free Readability formulas: 2 formulasSentence analysis: Yes
- 9 Readability Formulas No phone app RecognisedPhone appDocumentedFree plan 6.2Free Sentence analysis: YesClarity recommendations: Yes
- 10 Text Inspector No phone app RecognisedPhone appDocumentedFree plan 6.2Free Readability formulas: 3 formulasSentence analysis: YesClarity recommendations: Yes
- 11 UsingEnglish Text Analyser No phone app RecognisedPhone appDocumentedFree plan 6.2Free Sentence analysis: Yes
- 12 Analyze My Writing No phone app RecognisedPhone appDocumentedFree plan 6.1Free Sentence analysis: Yes
- 13 Data·yze Readability Analyzer No phone app RecognisedPhone appDocumentedFree plan 6.1Free Sentence analysis: YesClarity recommendations: Yes
- 14 Delimiter Readability Checker No phone app RecognisedPhone appDocumentedFree plan 6.1Free Readability formulas: 3 formulasSentence analysis: YesClarity recommendations: Yes
- 15 DO101 Readability Checker No phone app RecognisedPhone appDocumentedFree plan 6.1Free Readability formulas: 6 formulasSentence analysis: Yes
- 16 Eclipse Readability Studio No phone app RecognisedPhone appDocumentedFree plan 6.1Free Clarity recommendations: Yes
- 17 Flesch-Kincaid Calculator No phone app RecognisedPhone appDocumentedFree plan 6.1Free Sentence analysis: YesClarity recommendations: Yes
- 18 Flesch-Kincaid Readability & Grade Level Analyzer No phone app RecognisedPhone appDocumentedFree plan 6.1Free Sentence analysis: YesClarity recommendations: Yes
- 19 Readability.ch No phone app RecognisedPhone appDocumentedFree plan 6.1Free Sentence analysis: YesClarity recommendations: Yes
- 20 ReadabilityTool No phone app RecognisedPhone appDocumentedFree plan 6.1Free Readability formulas: 6 formulasSentence analysis: YesClarity recommendations: Yes
- 21 Slick Write No phone app RecognisedPhone appDocumentedFree plan 6.1Free
- 22 Hemingway Editor No phone app RecognisedPhone appDocumentedFree plan 5.8$0.69/mo
- 23 StyleWriter No phone app RecognisedPhone appDocumentedFree plan 5.5$90/mo
- 24 Orwellix No phone app RecognisedPhone appDocumentedFree plan 5.4$19.83/mo Sentence analysis: YesClarity recommendations: Yes
- 25 Readable No phone app RecognisedPhone appDocumentedFree plan 5.4$12/mo Readability formulas: 17 formulasSentence analysis: YesClarity recommendations: Yes
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Readability formulas | Sentence analysis |
|---|---|---|---|---|---|---|---|---|
| 1 | ProWritingAid | 6.4 | Free plan | $10/mo | Yes | 10 /mo | ||
| 2 | ATOS Analyzer | 6.3 | Free plan | Free | Yes | Yes | ||
| 3 | TextGears | 6.3 | Free plan | $2.48/mo | Yes | 2.48 /mo | ||
| 4 | AnchorKite Readability Checker | 6.2 | Free plan | Free | Yes | 6 formulas | Yes | |
| 5 | ApyHub Readability Scores Documents API | 6.2 | Free plan | $16/mo | Yes | 16 /mo | 2 formulas | Yes |
| 6 | Botoi Readability API | 6.2 | Free plan | $9/mo | Yes | 9 /mo | 3 formulas | Yes |
| 7 | Check Readability | 6.2 | Free plan | Free | Yes | 9 formulas | Yes | |
| 8 | Readability Analysis Tool (RAT) | 6.2 | Free plan | Free | Yes | 2 formulas | Yes | |
| 9 | Readability Formulas | 6.2 | Free plan | Free | Yes | Yes | ||
| 10 | Text Inspector | 6.2 | Free plan | Free | Yes | 3 formulas | Yes | |
| 11 | UsingEnglish Text Analyser | 6.2 | Free plan | Free | Yes | Yes | ||
| 12 | Analyze My Writing | 6.1 | Free plan | Free | Yes | Yes | ||
| 13 | Data·yze Readability Analyzer | 6.1 | Free plan | Free | Yes | Yes | ||
| 14 | Delimiter Readability Checker | 6.1 | Free plan | Free | Yes | 3 formulas | Yes | |
| 15 | DO101 Readability Checker | 6.1 | Free plan | Free | Yes | 6 formulas | Yes | |
| 16 | Eclipse Readability Studio | 6.1 | Free plan | Free | Yes | |||
| 17 | Flesch-Kincaid Calculator | 6.1 | Free plan | Free | Yes | Yes | ||
| 18 | Flesch-Kincaid Readability & Grade Level Analyzer | 6.1 | Free plan | Free | Yes | Yes | ||
| 19 | Readability.ch | 6.1 | Free plan | Free | Yes | Yes | ||
| 20 | ReadabilityTool | 6.1 | Free plan | Free | Yes | 6 formulas | Yes | |
| 21 | Slick Write | 6.1 | Free plan | Free | Yes | |||
| 22 | Hemingway Editor | 5.8 | $0.69/mo | Yes | ||||
| 23 | StyleWriter | 5.5 | No | $90/mo | No | |||
| 24 | Orwellix | 5.4 | No | $19.83/mo | No | 19.83 /mo | Yes | |
| 25 | Readable | 5.4 | No | $12/mo | No | 12 /mo | 17 formulas | Yes |
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