TONE Tab
Readability, naturalness and human writing style
What is the TONE Tab?
The TONE tab analyzes how natural and readable your content is. It shows readability metrics, a Naturalness Index (how human-sounding vs. AI-generated it appears), and recommendations to improve your writing style.
This tab works together with the 4-pillar radar: STRUCTURE, AI, READABILITY, and SEO.
Readability Score (0-100)
The readability score is a scale from 0 to 100 that indicates how easy your text is to read. The higher, the better.
General interpretation
90-100: Very easy (understandable for children)
70-89: Easy (understandable for general audience)
50-69: Somewhat difficult (requires concentration)
30-49: Difficult (specialized text)
0-29: Very difficult (advanced academic text)
Excellent readability (green)
Your text has a readability score of 70 or higher. It's accessible to most readers.
Readability could be improved (yellow)
Your text is between 50-69. Consider shortening sentences, using simpler words, and adding more transitions.
Low readability (red)
Your text has less than 50 points. Simplify the language, break up long sentences, and use shorter paragraphs.
Flesch Difficulty Index
The Flesch Index measures the complexity of your text on a scale where 30-70 is the ideal range for commercial web content.
Flesch Scale
0-30: Very difficult (legal, academic texts)
30-50: Difficult (specialized articles)
50-60: Somewhat difficult (official documents)
60-70: Standard (fiction, news) - IDEAL FOR WEB
70-100: Easy (comics, children's content)
Optimal Flesch Index (green)
Your text is in the 60-70 range. It's ideal for commercial web content.
Flesch Index out of range (yellow)
Your text is between 50-60 or 70-80. It's close to the ideal range but could be improved.
Text too complex (red)
Your text has a Flesch index below 50. Use shorter sentences and simpler words.
Writing Voice Tone
The voice tone evaluates whether your writing sounds natural, conversational, and engaging, or if it sounds robotic and generic.
Natural and engaging tone (green)
Your text has a conversational tone that connects with the reader.
Tone could be improved (yellow)
Your text sounds somewhat generic. Add natural expressions, personal examples, and a friendlier style.
Robotic tone (red)
Your text sounds very mechanical. Read your text aloud: if it sounds strange, change it.
How to improve tone
Speak directly to the reader using "you". Use short sentences and natural interruptions. Include personal opinions ("I believe", "in my experience"). Avoid empty filler words.
Ideal Length (1200-2500 words)
The length of your article should match the search intent and competition. The ideal range for most commercial articles is 1200-2500 words.
Length guide
300-600 words: Brief content, news
600-1200 words: Short informative articles
1200-2500 words: Complete commercial articles - IDEAL
2500-4000 words: Comprehensive guides
4000+ words: Maximum authority articles
Correct length (green)
Your article has between 1200-2500 words. It's ideal for SEO.
Length out of range (yellow)
Your text is slightly short (600-1200) or long (2500-4000). Adjust as needed.
Insufficient or excessive length (red)
Your text has less than 600 words or more than 4000. Review the length.
Sentence Length
Long sentences make reading difficult. The ideal average sentence length is 15-20 words.
1 How to verify your sentence length
Break sentences with more than 25 words into two. Each sentence should express only one idea.
Appropriate sentence length (green)
Most of your sentences have between 10-20 words.
Sentences too long (yellow)
You have sentences with more than 25 words. Divide them to improve readability.
Example of correct sentence
Bad (28 words): "If you want your business to appear in the first search results when someone searches for products like yours in your area, you need to work on local SEO constantly and strategically."
Good (14 words): "If you want your business to appear in the first results, you need to work on local SEO."
Paragraph Length
Long paragraphs overwhelm the reader. The ideal is paragraphs of 3-4 lines maximum in web content.
Concise paragraphs (green)
Your paragraphs have an appropriate length for web reading.
Paragraphs too long (yellow)
You have paragraphs of more than 5-6 lines. Divide them into smaller units.
Single paragraph rule
If a paragraph has more than 4-5 sentences, consider splitting it. Each paragraph should develop only one idea or aspect of the topic.
Use of Transition Words
Transition words ("also", "however", "for example", "in conclusion") connect ideas and make the text flow naturally.
Appropriate transitions (green)
You use enough transition words to connect your ideas.
Missing transitions (yellow)
Add more connectors: "also", "on the other hand", "however", "for example", "as for", "finally".
Common transitions
Addition: also, additionally, likewise
Contrast: however, nevertheless, on the contrary
Example: for example, such as, a case in point
Conclusion: in summary, in conclusion, finally
Cause/effect: therefore, as a result, due to
Featured Keyword in Bold
Highlighting your main keyword in bold at least once helps readers and Google identify the main topic.
Keyword in bold (green)
You have highlighted your main keyword in bold at least once.
Keyword not highlighted (yellow)
Add **your main keyword** in bold somewhere in the text (preferably in the first third).
How to do it correctly
Select your main keyword and apply bold. Once is enough. Don't abuse bold.
Naturalness Index (Human vs AI)
The Naturalness Index is a score that indicates how likely your text is to have been written by a human. It measures typical patterns of AI-generated text.
Interpretation
80-100%: Text with high probability of being human
50-79%: Mixed text, possibly AI-assisted
20-49%: Text with evident AI patterns
0-19%: Text very likely generated by AI
High naturalness (green)
Your text shows natural human patterns. Well done!
Medium naturalness (yellow)
Your text shows some typical AI patterns. Review repetitive or too-perfect sentences.
AI patterns detected (red)
Your text has very evident AI generation patterns. Rewrite sections with a more personal style.
How to sound more human
Use incomplete sentences occasionally. Include exceptions and nuances ("it depends on the case", "not always"). Add personal experiences and opinions. Avoid too perfect and repetitive structures.
The 4-Pillar Radar
In the TONE tab you'll see a graphical radar with 4 axes representing the pillars of optimized content:
The 4 pillars
STRUCTURE: Header hierarchy, lists, paragraphs
AI: LSI entities, data, Q&A format
READABILITY: Short sentences, transitions, natural tone
SEO: Keyword density, metadata, links
The radar lets you see at a glance which pillar needs the most improvement. A smaller area in the radar indicates that aspect needs more attention.