The Readability Analyzer checks how easy your text is to read. It uses established formulas to measure sentence complexity, word difficulty, and overall reading level. You see the results as you type or paste – no button to click, no page to reload.
It works on any type of content. Blog posts, emails, academic papers, product descriptions, social media captions – if it has words, this tool can analyze it.
The scores are based on proven linguistic formulas. The Flesch-Kincaid readability tests, developed in the 1970s and still widely used today, measure how readable English text is by looking at sentence length and syllable count. The Gunning Fog Index adds another layer by measuring the percentage of complex words in your text.
Paste your text into the box below and get an instant readability score. The tool checks your grade level, reading ease, passive voice, sentence complexity, and more. No login needed, results appear as you type.
Check How Easy Your Content Is to Read
Paste any text below — get instant scores for readability, grade level, reading time, passive voice, and more.
Readability Scores
Text Statistics
- Words0
- Characters (with spaces)0
- Characters (without spaces)0
- Sentences0
- Paragraphs0
- Avg. Words / Sentence0
- Syllables0
- Complex Words (3+ syllables)0
What You Get from this Readability Analyzer Tool
- Flesch Reading Ease score (0–100) with a plain label – Very Easy, Easy, Moderate, Difficult, or Very Difficult
- Flesch-Kincaid Grade Level so you know what education level your text targets
- Gunning Fog Index to measure how much complex vocabulary you are using
- Estimated Reading Time based on an average reading speed of 200 words per minute
- Word Count and Character Count (with and without spaces)
- Sentence Count and Paragraph Count.
- Average Words per Sentence
- Passive Voice percentage so you can spot weak sentences
- Sentence level color coding – green for easy sentences, yellow for moderate, red for long or hard ones
How to Use It
- Paste or type your text into the input box at the top of the page
- Results appear automatically as you type, no need to click anything
- Check the summary card for your overall grade and reading ease label
- Scroll through the sentence highlight preview to spot problem areas
- Review the detailed scores and statistics on the right panel
- Click Copy Results to save your analysis as plain text
- Click Clear to reset and start over with new content
The sentence highlight feature is one of the most useful parts. Each sentence gets a color based on its word count. Green means the sentence is short and easy to follow. Yellow means it is getting a bit long. Red means it is over 25 words and likely harder to read.
Who Uses a Reading Level Analyzer
Bloggers and content writers use it to make sure their posts are readable for a general audience. Most online readers prefer content written at a 6th to 8th grade level.
SEO professionals use it because readability is a factor in how long people stay on a page. Content that is easy to read tends to get lower bounce rates.
Students and academics use it to check if their writing matches the expected complexity for their assignment or publication.
Email marketers use it to write clearer subject lines and body copy. Simpler emails tend to get higher open and click rates.
Developers and technical writers use it to make documentation less intimidating for users who are not experts in the subject.
Teachers and educators use it to check if reading material is appropriate for their students’ age and level.
Frequently Asked Questions
What is a readability analyzer?
A readability analyzer is a tool that measures how easy a piece of text is to read. It uses mathematical formulas that look at things like sentence length and word complexity to give you a score or grade level.
What is a good Flesch Reading Ease score?
A score between 60 and 70 is considered standard and works well for most general audiences. Scores above 70 are easier to read. Scores below 30 are very difficult and better suited for technical or academic content.
What Flesch-Kincaid grade level should I aim for?
For most online content, a grade level between 6 and 8 works best. That does not mean your content is too simple. It means it is clear and accessible. Even well-educated readers prefer content that does not make them work hard.
What is the Gunning Fog Index?
The Gunning Fog Index is a readability formula that estimates the years of formal education a reader needs to understand a piece of text on first reading. A score of 8 or below is considered easy to read for most people.
Why does passive voice matter in writing?
Passive voice makes sentences harder to follow because the subject of the action is not always clear. Active voice is more direct. A passive voice percentage below 15% is generally considered good for most types of writing.
Is this tool free to use?
Yes. This Readability Analyzer is completely free. There is no account to create and no limit on how much text you can analyze.
Does this tool store my text?
No. All analysis happens directly in your browser. Your text never leaves your device and is not sent to any server.
What types of content can I analyze?
Any English text works. Blog posts, articles, emails, essays, product pages, social media content, scripts, AI prompts – all of it. The tool works best with complete sentences and paragraphs rather than short fragments or lists.
How is reading time calculated?
Reading time is estimated based on an average adult reading speed of 200 words per minute. This is a commonly used benchmark for average reading speed in general audiences.
Can I use this tool on my phone?
Yes. The tool is fully responsive and works on all screen sizes including phones and tablets.