Readability Checker
Paste your essay, article, or report to instantly measure how easy it is to read — with Flesch Reading Ease, Flesch-Kincaid grade level, Gunning Fog, SMOG, Coleman-Liau, and ARI scores.
Readability
Why readability matters for students
Clear writing earns better grades. Examiners and professors read dozens of essays, and arguments that are easy to follow are easier to reward. A readability checker gives you an objective second opinion: it flags sentences that have grown too long and vocabulary that may be obscuring your point. Whether you are polishing a personal statement, a lab report, or a dissertation chapter, measuring readability helps you write for your reader instead of just for yourself.
Which score should I trust?
No single formula is perfect, which is why this tool reports six of them. The Flesch Reading Ease is the quickest gut-check — higher is easier. The grade-level scores (Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and ARI) each estimate the US school grade needed to understand your text, and the consensus grade averages them so one outlier does not mislead you. For most academic essays, a consensus grade between 8 and 12 is a healthy target.
How to improve your readability
- Shorten sentences: aim for an average of 15–20 words per sentence. Split long sentences at conjunctions.
- Prefer simple words: replace multi-syllable words with plainer alternatives where the meaning allows.
- Cut filler: remove redundant phrases that inflate sentence length without adding meaning.
- Re-check as you edit: the scores above update live, so you can see the effect of each revision instantly.
Privacy and security first
At StudyFlow, your academic work belongs to you. This readability checker runs entirely inside your web browser — your text is never uploaded to a server, stored in a database, or logged. All processing happens locally on your device, which keeps your unpublished essays private and makes the tool instant.
Was this tool helpful?
Your feedback helps us improve StudyFlow for everyone.
How it works
- 1Paste or type your text into the editor below.
- 2Scores update in real time as you write — no button to press.
- 3Lower long sentences and complex words to improve your scores.
Frequently asked questions
What is a good readability score?
For general academic and web writing, aim for a Flesch Reading Ease of 60–70 (Standard) and a Flesch-Kincaid grade level of 8–10. Specialist or technical writing naturally scores higher (harder); aim lower if you want a wider audience to follow easily.
How is the Flesch Reading Ease calculated?
Flesch Reading Ease = 206.835 − 1.015 × (words ÷ sentences) − 84.6 × (syllables ÷ words). Higher scores mean easier text: 90–100 is very easy, 60–70 is standard, and below 30 is very difficult.
What does the consensus grade level mean?
It is the average of five grade-level formulas (Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and the Automated Readability Index), rounded to a single US school grade. A consensus grade of 10 means a typical 10th-grade student should understand the text.
How are syllables counted?
Syllables are estimated with a standard vowel-group heuristic — the same approach used by most online readability checkers. It is highly accurate for common English words, though unusual words or proper nouns can occasionally be off by one.
Is my text uploaded anywhere?
No. The analysis runs entirely in your browser using JavaScript. Your text is never sent to a server, stored, or logged.