Best Readability Score Checker Tools

“Readability” stands for the better and clearer writing for the websites. It’s an important factor, considered by SEO when ranking website by most search engines. So it’s in your interest to get the best readability level. Readability is the ease of content understanding, a measure of the accessibility of a text that shows how easily the content reaches the target audience.

It’s a computer-calculated index that determines the extent to which people engage with the content. It shouldn’t be too hard or too easy to read. There are many ways to measure readability score, such as Flesch-Kincaid Grade Level, Flesch Reading Ease, Gunning-Fog Index, and Coleman-Liau Index.

The reading age and education level of your audience might be surprisingly lower than you expect. So to help them read faster you might want to use simpler words and sentences. Also, people don’t read very careful online, so to keep their attention you should keep your content structure simple. Be careful when editing texts to make them user-friendly.

Readability is an important factor when increasing your website engagements. If you want to estimate the readability of your website, you need a special readability score checker. To help you, here is the list of top readability checkers: allows you to score any kind of text from Word Docs to websites. It uses the Flesch-Kincaid algorithm, the Gunning Fox Index, Flesch Reading Ease, SMOG Index, Automated Readability Index, and Coleman-Liau Index. By analyzing keyword density, sentiment, and calculating typical reading and speaking times for your text, it highlights long and too long sentences and mistakes for you to fix. You will also get detailed statistics for your text and composition stats such as noun, adjective, adverb counts. It’s used by many professionals in the SEO field.


PerryMarshall is a free and easy to use tool. By using 5 readability formulas it scores the grade level of your text. Simply paste the text in the box and it will do all the calculations.


Grammarly is a built-in word processor that makes sure that everything is typed effectively, clearly, and mistake-free. It can be used anywhere on the web. Grammarly also offers a plagiarism checker and many more additional features if you go for Grammarly Premium. It scans your test and highlights all types of mistakes – grammar, punctuation, spelling – and gives you detailed explanation and options to correct the mistakes. It also can improve your vocabulary.

Gunning Fog Index

Gunning Fog Index shows the years of education one needs to read the text. This tool focuses on the use of this index.

Automatic Readability Checker

Automatic Readability Checker uses 7 readability formulas to determine if text can be easily read by the intended audience. Just paste your text sample (150-3000 words) in the box and check the results.

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