Text SEO Analyzer
Analyze your text for readability using LIX and Flesch, plus word count and keyword density, completely local in your browser.
Your inputs are processed in your browser and are not transmitted to our servers. Note: third-party resources (e.g. advertising and analytics from Google/Cloudflare) and an optional PayPal donation link may transfer data when loading or when clicked. Browser extensions or plugins may be able to read content that is visible in the input fields.
The result will appear here …
How to use this tool (video)
This video is hosted on YouTube. When you play it, data may be sent to Google.
Text SEO Analyzer: check readability and keyword density
The text SEO analyzer helps you improve content for search engines and readers. It analyses word and sentence counts, readability (LIX and Flesch Reading Ease) and the keyword density of an optional focus keyword. It runs 100% locally and never sends data to a server.
What is calculated
- Word count and sentence count.
- LIX readability index: below 40 is very easy, above 70 is very hard.
- Flesch Reading Ease: a reference score from 0 to 100.
- Keyword density and number of occurrences for a focus keyword.
A keyword density above about 3% can look like keyword stuffing. The LIX is well suited to German; the Flesch value is more of an English-oriented reference.
Frequently asked questions
What is a good keyword density?
Values between 0.5% and 2% are common. Above about 3% the text can look like keyword stuffing and should be revised.
Are my texts stored?
No. The analysis runs 100% locally in your browser. Your text never leaves your device.