アクセシビリティ
Built for screen readers, parsed by search engines and AI alike. 影響スコア: SEO + AIO
One structure, three audiences
Alt text, labeled forms, a declared language and real link names make a site usable with assistive technology, and the same explicit structure is exactly what search crawlers and AI assistants parse. Accessibility work is machine-readability work.
It's also increasingly a legal expectation in many markets, and an audience you're otherwise turning away.
What this site measures
The machine-checkable subset: a lang attribute on the page, alt text coverage on images, labels on visible form fields, and links that have an accessible name. Color contrast and keyboard operation need a manual or in-browser audit; the review says so rather than guessing.
How to improve
- Describe informative images in alt text; use empty alt for pure decoration.
- Give every form field a label (or aria-label) that survives placeholder text.
- Never ship icon-only links without an aria-label.
- Declare <html lang="…"> so screen readers pick the right voice.
- Run a free automated audit (axe, WAVE, Lighthouse) and fix what it finds.
Common mistakes
alt="image123.jpg". Placeholder text used instead of labels, which disappears the moment someone types. Click-here links that read as 'click here, click here, click here' to a screen reader.
この指標でサイトの現状を確認する: 評価し、すべてのチェックに根拠を表示します。
自サイトを評価する →さらにガイドを見る
見つけてもらえるウェブサイトの作り方
Starting from zero? The platform choices, pages and foundations that decide whether your site is visible from day one.
完全ガイドを読む →正しい順序でウェブサイトを改善する
The improvement playbook: what to fix first, what compounds, and how to verify each step actually landed.
完全ガイドを読む →GEO・AEO・LLMO：新しい頭字語を解説
The three terms you'll hear most for AI-era optimization: what each means, how they differ, and what to actually do about them.
完全ガイドを読む →検索順位の仕組み
Crawling, indexing, ranking, and which of the three you actually control.
完全ガイドを読む →AI・回答エンジン（AIO）
A growing share of questions never reach a results page; an assistant answers them.
完全ガイドを読む →タイトル・メタディスクリプション
Your headline and your sales pitch in every results page and AI citation.
完全ガイドを読む →