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Readability Scorer

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About Readability Scorer

The Readability Scorer analyzes your text and calculates well-known readability indices including Flesch-Kincaid, Gunning Fog, Coleman-Liau, and SMOG. It helps writers, educators, and marketers ensure their content matches the reading level of their target audience. Get an instant grade-level assessment along with actionable suggestions to improve clarity.

Key Features

  • Flesch Reading Ease and Flesch-Kincaid Grade Level scoring
  • Gunning Fog Index for business and technical writing assessment
  • Coleman-Liau and SMOG Index for additional grade-level perspectives
  • Average words per sentence and syllables per word breakdown
  • Difficulty rating from very easy to very difficult with color coding
  • Actionable tips to lower complexity such as shortening sentences and simplifying vocabulary

How to Use Readability Scorer

  1. 1

    Paste your text

    Copy the article, email, or document you want to evaluate and paste it into the input area. Longer texts produce more reliable scores.

  2. 2

    Review the readability scores

    The tool calculates multiple readability indices simultaneously and displays each score with its corresponding grade level.

  3. 3

    Interpret the results

    A Flesch Reading Ease score of 60-70 is considered ideal for general audiences. Scores below 30 indicate very difficult academic or legal text.

  4. 4

    Read the improvement suggestions

    Follow the provided tips to reduce sentence length, replace complex words, and improve overall readability for your intended audience.

  5. 5

    Re-test after edits

    Make changes to your text and paste the revised version to see how your scores have improved.

Common Use Cases

Content marketing

Marketing teams can ensure blog posts, landing pages, and email campaigns are written at a reading level that resonates with their target demographic.

Educational material design

Teachers and curriculum designers can verify that textbooks, worksheets, and instructions are appropriate for their students' grade level.

Legal and medical plain-language compliance

Organizations can check that patient-facing health documents or consumer contracts meet plain-language regulations that typically require an 8th-grade reading level or lower.

Technical documentation review

Technical writers can balance accuracy with accessibility by testing whether API docs or user guides are comprehensible to their audience.

Why Use Our Readability Scorer

Most free readability tools only show one or two scores, but ours calculates Flesch-Kincaid, Gunning Fog, Coleman-Liau, and SMOG simultaneously for a comprehensive assessment. You also get actionable improvement suggestions — not just numbers — so you can immediately start simplifying your writing. No sign-up required and your text is never stored or transmitted.

Analyze Without Exposure

Your articles, patient documents, and legal texts are scored entirely in your browser — no content is uploaded to a server for analysis. This makes the tool safe for healthcare plain-language compliance checks and pre-publication editorial reviews. All readability calculations happen in real time on your own device.

Frequently Asked Questions

What is a good Flesch Reading Ease score?
A score between 60 and 70 is considered plain English suitable for most adults. Scores above 80 are very easy to read (suitable for children), while scores below 30 are best understood by university graduates. Aim for 60-70 for general web content.
How much text do I need for an accurate score?
Readability formulas are most reliable with at least 100-200 words. Very short texts of just a sentence or two can produce misleading scores because a single long word or complex sentence disproportionately affects the result.
Why do different readability formulas give different grade levels?
Each formula weighs different factors. Flesch-Kincaid focuses on sentence length and syllable count, Gunning Fog emphasizes complex (3+ syllable) words, and Coleman-Liau uses character counts instead of syllables. Using multiple indices gives a more well-rounded picture.

Last updated: April 6, 2026