EN — Flesch-Kincaid AR — Arabic Readability Index Keyword Density Analysis Free • No Sign-up • Instant

SEO Readability Score Checker

Paste your content below — the tool instantly calculates your readability score using Flesch-Kincaid (English) or the Arabic Readability Index (Arabic), and checks every keyword for stuffing and spam signals.

0-100
Score Range
2
Languages
80+
Keywords Tracked
0s
No Server — 100% Client-side
Your Content
EN / AR
0 chars · 0 words Auto-detects language
Please paste some content first.
Readability Score
Flesch-Kincaid / ARI

Click Analyze Content to see your readability score, grade level, and a sentence/word breakdown.

Keyword Density & Status

Run the analysis to see keyword density, usage counts, and spam signals for every word and phrase.

How Your Score is Calculated & Best Practices
How the Readability Score is Calculated

The tool auto-detects the language of your content. If more than 50% of the characters are Arabic, it switches to Arabic mode automatically, shown by a 🌙 Arabic Mode badge.

EN English — Flesch-Kincaid Reading Ease
Score = 206.835 − 1.015×(words÷sentences) − 84.6×(syllables÷words)
  • Words ÷ Sentences = average sentence length
  • Syllables ÷ Words = average word complexity
  • Scale: 0–100 (higher = easier to read)
AR Arabic — Arabic Readability Index (Adapted)
Score = 100 − (avgSentLen × 1.7) − (avgWordLen × 5.5)
  • avgSentLen = average words per sentence
  • avgWordLen = average Arabic word length in characters
  • Flesch-Kincaid syllable counting does not apply to Arabic root-based morphology
Score Reference Guide
Score Grade Level Meaning Best For
70–100 6th grade or below Very easy Landing pages, product pages, marketing copy
50–69 7th–10th grade Fairly readable Blog posts, service pages, general web copy
30–49 10th–12th grade Difficult Technical docs, legal text, specialist content
0–29 College+ Very complex Academic or scientific papers only
Best Practices to Improve Your Score
Shorten Your Sentences

Aim for 15–20 words per sentence. Split long compound sentences with a full stop instead of commas. One idea per sentence is the golden rule.

Use Simpler Words

Prefer 1–2 syllable words. Replace utilise → use, demonstrate → show, facilitate → help. Only use technical terms when writing for specialists.

Structure Your Content

Use short paragraphs of 2–4 sentences. Break walls of text with headings and bullet lists. Readers scan before they read — shorter units are less intimidating.


How Keyword Density is Calculated

Keyword density measures how often a word or phrase appears relative to total word count. The tool checks both single words (unigrams) and two-word phrases (bigrams):

Density (%) = ( occurrences ÷ total words ) × 100
  • Stop words are excluded automatically — separate stop lists for English and Arabic.
  • Bigrams are scored as a single unit — e.g. "web design" or "تصميم موقع" counts as one phrase.
  • For Arabic, root normalisation is applied: أ / إ / آ → ا and ة → ه variants are unified.
  • Results are sorted by count descending — the most-used terms appear first.
Status Badges — What They Mean
BadgeDensityMeaningWhat to do
OK Below 3% Healthy — keyword appears naturally Nothing needed — this is the ideal range
Watch 3%–5% Borderline — appearing frequently Replace some occurrences with synonyms
Spam Risk Above 5% Keyword stuffing risk — Google may penalise Reduce significantly. 1–2% is ideal
Ideal keyword density targets:
  • Primary keyword: 1%–2% — appears in title, H1, first paragraph, meta description, and body text.
  • Secondary / supporting keywords: 0.5%–1% — used in subheadings and naturally woven into copy.
  • LSI / semantic keywords: as low as 0.2% is valuable — they signal topic depth to Google.
Quick fix for Spam Risk keywords: Use Find & Replace in your editor. For every 3rd–4th occurrence of a flagged keyword, replace it with a synonym (e.g. "software" → "platform", "solution", "system", "tool"). Keep at least one exact match in the first 100 words for your primary keyword.

Frequently Asked Questions

A readability score measures how easy your content is to read. The Flesch-Kincaid score (0-100) is the widely accepted standard. Google prioritizes content that users can easily consume, and scores above 60 indicate clear, accessible writing.

Yes. The tool automatically detects Arabic text (when over 50% of characters are Arabic) and switches to the Arabic Readability Index formula, which is adapted for Arabic sentence structure and word length. A moon Arabic Mode badge is shown when this mode is active.

Keyword density is how often a keyword appears relative to total word count. Google can penalise pages with over 5% density (keyword stuffing). The ideal range for a primary keyword is 1%-2%. This tool highlights all keywords exceeding 2.5% with a Watch or Spam Risk badge.

Yes. The tool is completely free and requires no registration or login. All analysis runs instantly in your browser - your content is never sent to any server.

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