UtilitySansar
すべてのツール
カテゴリ
DeveloperMathTextDesignEncodingSecurityMarketingDataFinanceCloud
Text

Readability Score Checker

Score any text against the five most-cited readability formulas — Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, the Automated Readability Index (ARI), and Coleman-Liau — so you can match your writing to the audience you actually want to reach. See the averaged grade level, the school-level audience label, and word/sentence/syllable stats at a glance.

ツール要約

このツールは構造化された入力を受け取り、サーバーへアップロードせずにブラウザで決定的な出力を返します。

ツール名
Readability Score Checker
入力の目的
変換・検証・分析するソースコンテンツを入力してください。
出力の目的
コピー・再利用・デバッグに適した正規化された出力を受け取ります。
入力例
Plain language is a style of writing that values clarity over cleverness. When you write for general readers, short sentences and familiar words help your message land.
出力例
Flesch ease: 67.0 (8th-9th grade — plain English) · Average grade: 8.2
Recent inputs0

Your last 5 inputs will appear here.

Flesch Reading Ease
70.17th grade — fairly easy
Average grade level
8.2
HarderEasier
Flesch-Kincaid
5.7grade

U.S. school grade required to read the text on first pass.

Gunning Fog
8.0grade

Years of formal education needed; weights complex (3+ syllable) words.

SMOG
8.8grade

Estimated years of education for full comprehension. Best on 30+ sentence samples.

Automated Readability
7.2grade

ARI uses characters and sentences instead of syllables — useful for short text.

Coleman-Liau
11.0grade

Like ARI, character-based. Good for OCR'd or auto-generated text.

Average of five
8.2grade

Average of all five grade-level formulas. A balanced single number.

Sentences8
Words73
Syllables110
Complex words8
Letters373

ツールの紹介

Score any text against the five most-cited readability formulas — Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, the Automated Readability Index (ARI), and Coleman-Liau — so you can match your writing to the audience you actually want to reach. See the averaged grade level, the school-level audience label, and word/sentence/syllable stats at a glance.

ツール概要

Different formulas weight different things — Flesch-Kincaid leans on syllable counts, ARI and Coleman-Liau use character counts, Gunning Fog and SMOG penalize long words. Each gives a slightly different angle on the same draft. Showing all five plus their average makes it easy to spot when your writing is genuinely too dense versus when one formula is over-penalizing a niche style. Everything runs client-side; no draft is uploaded.

ユースケース

  • Tune marketing copy to a 6th-9th grade reading level for broad reach
  • Audit technical documentation for accidental jargon density
  • Match academic writing to journal or course expectations
  • Test ESL-friendly content against the Flesch ease score
  • Compare different drafts of the same paragraph side-by-side

入力／出力の例

Short sentences and familiar words land in the 'plain English' band — exactly what most marketing and journalism target.
入力の目的
Plain language is a style of writing that values clarity over cleverness. When you write for general readers, short sentences and familiar words help your message land.
出力の目的
Flesch ease: 67.0 (8th-9th grade — plain English) · Average grade: 8.2

よくある質問

Which score should I trust?+
Look at the average. For most general writing the Flesch Reading Ease is the most intuitive — aim for 60-70 to reach the broad public. For technical writing, the average grade level is the more useful number.
Why do the scores disagree?+
Each formula weights different signals. SMOG penalizes 3+ syllable words heavily, ARI focuses on character counts. A draft full of short technical jargon (like 'SQL', 'API') confuses character-based formulas but Flesch-Kincaid handles it fine.
Is the syllable count exact?+
It's heuristic — like every browser-based readability tool — and accurate within a few percent for English text. Names, acronyms, and very unusual spellings can drift.
Does it work for non-English?+
The formulas were calibrated for English. Spanish, French, German, etc. will still produce numbers, but the grade-level mapping isn't valid. Use it for relative comparisons, not absolute claims.

Share this tool

他のツールを見る

下記の Text カテゴリで関連ユーティリティを探す。

Text をすべて見る

関連ツール

役に立ちそうな厳選ユーティリティ