無料オンライン可読性アナライザー
複数の指標とスコアでテキストの可読性を分析します。
Frequently Asked Questions
How is readability analysis different from grammar checking?
Grammar checking catches errors (incorrect usage, spelling mistakes). Readability analysis measures how easy the text is to understand — sentence length, vocabulary complexity, and structure — regardless of grammatical correctness.
What Flesch-Kincaid grade level should business content target?
Business communications: Grade 7–9. Marketing copy: Grade 6–8. Legal documents (required to simplify): Grade 8–10. Academic papers: Grade 12+. The lower the grade level, the more accessible the content is.
What makes a sentence too complex?
Overly long sentences (over 25 words), multiple subordinate clauses, Latinate vocabulary (over 3 syllables), passive voice, and dense noun stacks all contribute to complexity. The analyzer highlights each issue type separately.
How do I reduce the Gunning Fog Index of my writing?
The Gunning Fog Index measures the percentage of "complex words" (3+ syllables). Reduce it by: using shorter word alternatives (use, not utilize; help, not facilitate; show, not demonstrate), breaking long sentences in two, and favoring active voice.
Does the readability analyzer work for non-English text?
The readability formulas were developed for English and work best with English text. Results for other languages may not be accurate — each language has its own readability characteristics and dedicated formulas.
Is the 可読性アナライザー free to use?
Yes, the 可読性アナライザー on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the 可読性アナライザー work?
複数の指標とスコアでテキストの可読性を分析します。 Your input is processed on Cloudflare's edge infrastructure — it is not stored, logged, or shared with any third party.
Do I need to install anything to use the 可読性アナライザー?
No installation needed. The 可読性アナライザー runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the 可読性アナライザー?
Yes. Your input is processed on Cloudflare's globally distributed edge network. Data is used only to generate your result and is never stored, logged, or shared with any third party.
Does the 可読性アナライザー work offline?
No — the 可読性アナライザー processes your input on Cloudflare's edge servers and requires an internet connection.
Does the 可読性アナライザー save my work automatically?
The 可読性アナライザー operates entirely in your current browser session. Your input is not saved to any server. Use your browser's bookmark or your device's clipboard to preserve results between sessions.
Does the 可読性アナライザー remember my previous inputs?
By default, the 可読性アナライザー starts fresh each session. Allio Tools Pro users have session history saved locally in the browser. No input data is transmitted to or stored on any server in either case.
Does the 可読性アナライザー work on all browsers?
Yes. The 可読性アナライザー is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.
How do I save or export my results from the 可読性アナライザー?
Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.