Free & open source

Readability Analyzer

Flesch-Kincaid, Gunning Fog, and SMOG scores computed on the extracted article content, not raw HTML, plus a plain-English reading level.

The article text is extracted with the same algorithm Firefox Reader View uses, so scores reflect the actual content, not navigation or footer boilerplate.

6
Readability formulas
100
Min words for reliable score
10
Checks per minute
Live
Not cached
Readability scorerLive extraction

How it works

1

Paste a URL

Any article, blog post, or page you want scored - no account or API key needed.

2

We extract the real article

Same engine as Firefox Reader View: navigation, ads, and footer boilerplate are stripped out before anything is scored.

3

Six formulas run on that text

Flesch Reading Ease plus five grade-level formulas, shown side by side with plain-English takeaways.

Questions

The extracted article content only. Nav, ads, and footer text are stripped first using the same Readability engine Firefox Reader View runs, since raw HTML would pollute every score.

Below 100 words of extracted content, scores are still shown but flagged as low-confidence - readability formulas get noisy on short passages.

Each formula estimates reading grade level using a different method, and they can legitimately disagree - so they are shown side by side rather than averaged into one number.

10 checks per minute. Fetching and parsing a full page is heavier than the simpler checks on this site, so the limit is tighter.

No. The analysis runs live and results are only kept in this page for your current session - nothing is saved server-side.

Plain language most adults read easily, unless you write for specialists, where clarity matters more than the score. If a draft reads badly, the SEO content paraphraser rewrites it with your keywords kept in place. If you plan to pitch it as a guest post, run it through the guest post link checker first.

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