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Paste any text to check how easy it is to read. Works with any language — English uses the Flesch reading-ease formula; other scripts (Tamil, Hindi, Arabic, CJK, etc.) get a script-neutral difficulty estimate, since Flesch's syllable math is English-specific.
Readability describes how easy a text is to read and understand. Short sentences, familiar words and clear structure make content easier; long sentences, jargon and dense paragraphs make it harder. Readability formulas estimate this from measurable features such as sentence length and word length.
The best known is the Flesch reading-ease score for English, which runs from 0 to 100 — higher means easier. A related grade level estimates the school level needed to follow the text. These formulas rely on English syllable patterns, so other languages need a more neutral estimate based on sentence and word length.
Readable content keeps visitors on the page, helps people on phones and those reading in a second language, and makes answers easier for search engines and AI tools to quote. Readability is not about simplifying ideas — it is about expressing them clearly.
Most people skim online. Text written at an accessible reading level keeps visitors on the page longer and makes your content easier for search engines and AI systems to summarise.
For most websites, a Flesch score of about 60 or higher suits a general audience. Technical audiences can handle lower scores, but shorter sentences still help.
To improve the score, split sentences longer than about 20–25 words, replace jargon with everyday words or explain it, use lists for steps, and break long paragraphs. Then check again.
An insurance broker in Johannesburg published a guide to choosing car insurance, but analytics showed most visitors left within 30 seconds.
The Readability Checker gave the guide a Flesch score of 32 with an average sentence length of 31 words. The broker split long sentences, replaced terms such as "indemnification" with plain explanations, and turned the comparison of policy types into a short list. The rewritten guide scored 62, visitors spent more than twice as long on the page, and more of them requested quotes.
A 0–100 score based on sentence length and syllables per word; higher means easier to read.
Word, sentence and reading-time counts work for any language; the Flesch score is designed for English.
No. Everything is calculated in your browser.
For general audiences, a Flesch score of about 60 or higher. Technical audiences can handle lower scores, but shorter sentences still help.
Not as a direct ranking factor, but clear writing keeps readers on the page and makes answers easier to quote.
From the word count and an average reading speed, so treat it as an estimate.
Yes. Readability Checker runs entirely in your browser — nothing you type or paste is sent to or stored by SeoSpidie.
Yes. The Readability Checker is free to use with no sign-up. SeoSpidie is supported by advertising.
