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Readability Score Checker: Flesch & Grade Level

Check your writing's readability with Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog scores.

Runs entirely in your browser β€” your files are never uploaded to a server.

Last updated

This tool processes your input entirely in your browser. Nothing is sent to our servers.

How It Works

1. Choose Your File

Drag & drop or select the file you want to work with.

2. Processed in Your Browser

Everything happens locally on your device β€” your file is never uploaded anywhere.

3. Download Your Result

Get your finished file instantly, ready to save or share.

About Readability Score Checker: Flesch & Grade Level

Readability scores estimate how easy a piece of writing is to understand based on measurable factors like sentence length and word complexity β€” not subjective judgment, but calculable metrics that correlate reasonably well with how difficult text actually is to read.

The most common metric, Flesch-Kincaid grade level, estimates the US school grade level a reader would need to easily understand the text. General public-facing writing (news articles, marketing copy) typically aims for around 8th-9th grade level β€” not because the audience can’t read anything more complex, but because simpler writing is faster and easier to process for everyone, including highly literate readers skimming quickly.

A readability score is a useful signal, not a strict target to hit exactly β€” technical or academic writing reasonably scores higher (more complex) than general audience writing, and that’s appropriate for its actual audience rather than a flaw to fix.

Frequently Asked Questions

What is a good Flesch Reading Ease score?

A score of 60 to 70 is generally considered plain English, and higher is easier to read. This tool labels 60 to 69 as Standard (8th to 9th grade) and 70 or more as Fairly Easy. Aim for 60 or above for general web content.

Which readability formulas does this tool use?

Three: Flesch Reading Ease, Flesch-Kincaid Grade Level and the Gunning Fog Index. Each is calculated from average sentence length and word complexity. SMOG, Coleman-Liau and sentence-by-sentence highlighting are not included, so you see overall scores for the pasted text only.

Does it work for languages other than English?

No. The formulas and syllable counting are designed for English, so scores for other languages are not meaningful. Even in English, syllables are estimated by a simple rule, so treat results as a helpful guide rather than an exact measurement.

How can I improve my readability score?

Shorten your sentences, swap long words for shorter ones and cut words with three or more syllables where you can. Paste your edited text back in and the scores update as you type, so you can see which changes help.