Text Analyzer
Deep text analysis: readability grades (Flesch, SMOG, ARI), sentiment scoring, keyword density, vocabulary richness & letter frequency.
Free Text Analyzer — Readability, Sentiment & Keyword Density
Toolify's Text Analyzer performs a comprehensive analysis of any text. Paste your content and instantly get a Flesch-Kincaid readability score, SMOG index, ARI grade level, sentiment classification (positive / negative / neutral), keyword density breakdown, and vocabulary richness score.
Whether you're a blogger, copywriter, or SEO specialist, these metrics help you write content that resonates with readers and ranks better on search engines.
Frequently Asked Questions
What is the Flesch-Kincaid readability score?
The Flesch-Kincaid Reading Ease score ranges from 0 to 100. A score of 60–70 is considered ideal for general audiences. Higher scores mean easier reading. The formula considers average sentence length and average number of syllables per word.
What does sentiment analysis show?
Sentiment analysis classifies the overall emotional tone of your text as positive, negative, or neutral. It's useful for checking if your marketing copy sounds friendly, if a review is complimentary, or if product descriptions have the right tone.
What is a good keyword density for SEO?
SEO best practice recommends a keyword density of 1–2% — meaning your primary keyword should appear about once or twice per 100 words. Going higher can trigger keyword stuffing penalties from search engines.
Can I use this to improve my writing?
Absolutely. The tool highlights complex sentences, passive voice usage, and overused words — all common writing issues. Fixing them improves both readability and SEO performance.
Does the text analyzer store my content?
No. All analysis happens in your browser. Your text is never sent to our servers, so your content stays completely private.