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Readability Score Checker
Make your content clearer and more engaging with instant readability scores.
Readability affects user engagement, bounce rate, and even rankings. NakedURL analyses your content using four different readability formulas and tells you your tone of voice.
4
Readability scores
1
Tone of voice
30s
Audit duration
100%
Free always
Key Findings
Flesch Reading Ease medium
1. Why Readability Matters
Readability is a measure of how easy your content is to understand. High readability keeps users engaged, lowers bounce rate, and signals quality to search engines. NakedURL provides four different scores to give you a complete picture.
2. The Four Scores Explained
Flesch Reading Ease – a score from 0‑100, with 60+ being good for general audiences. Flesch‑Kincaid Grade – the US school grade required to understand your text. Gunning Fog Index – estimates years of formal education needed. SMOG Index – another grade‑level score focusing on complex words.
3. How to Improve Your Scores
To boost readability, write shorter sentences, use simple words, and break up long paragraphs. Avoid jargon and overly complex language. NakedURL also detects your tone of voice – formal, casual, persuasive, or technical – so you can adjust it to match your audience.
- Keep sentences under 20 words
- Use active voice and avoid unnecessary adverbs
- Replace complex words with simpler alternatives
- Use bullet points and subheadings to improve scannability
⚠️ The Problem
Complex content drives visitors away
- Low Flesch scores – content is hard to read
- High grade‑level scores – too academic or technical
- Long sentences and dense paragraphs
- No clear tone – inconsistent voice
✅ NakedURL Solution
NakedURL gives you clear readability insights
- Instant Flesch, Flesch‑Kincaid, Gunning Fog, and SMOG scores
- Detected tone of voice (formal, casual, persuasive, technical)
- Recommendations for each score
- Average sentence length – a key readability factor
Key Features
Flesch Reading Ease
A quick indicator of how easy your content is to understand.
Flesch‑Kincaid Grade
The school grade level required to read your content.
Gunning Fog Index
Measures the complexity of your writing.
SMOG Index
A grade‑level score focusing on complex words.
Tone of voice
Detects whether your tone is formal, casual, persuasive, or technical.
My Flesch score is 45 – is that bad?
It's below average. Aim for a Flesch score above 60 for most audiences. NakedURL will show you exactly where your content is too complex and give you tips to simplify it.
Frequently Asked Questions
What is NakedURL and how does it work?
NakedURL is a free SEO and GEO audit tool that checks 60+ metrics on any website. It analyses meta tags, readability, backlinks, structured data, AI readiness, and more – all in under 30 seconds.
Is NakedURL really free?
Yes. NakedURL is completely free with no sign‑up or credit card required. You get full access to all 60+ checks and insights.
How can I use AI to improve my SEO?
Run an audit, then copy the recommendations and paste them into your preferred LLM (ChatGPT, Claude, etc.) with a prompt asking for specific code or content changes for your framework.
How long does the audit take?
Most audits complete in 10‑30 seconds. The time depends on your server speed and the complexity of your site.
Do I need to create an account?
No. NakedURL requires no registration. Just enter a URL and get your report instantly.
What is GEO and why does it matter?
GEO (Generative Engine Optimization) optimises your content for AI search engines like ChatGPT and Perplexity. It involves llms.txt, question headings, FAQ schema, and allowing AI bots.