Chrome Extension Chrome Web Store

Measure contrast as it appears on screen.

Just drag over the area you want to check.

The extension analyzes the pixels actually displayed on screen and automatically detects foreground and background colors. With images, gradients, transparency, and overlapping effects—areas where traditional HTML/CSS-based tools struggle—you can verify them the way users actually see them.

In addition to WCAG 2.1 / 2.2 contrast judgment, it also supports APCA.

See a page's structure at a glance.

Headings, links, landmarks, accessible names, ARIA states, and other page structure used by assistive technologies are displayed together in Chrome's side panel.

Instead of displaying countless markers on the page, you can identify issues while surveying the overall structure.

In environments with Chrome's built-in AI, you can also see hints for fixing detected issues.

From writing correctly to communicating clearly.

Transform difficult Japanese into easy-to-read expressions with a single click.
Diagnose text readability with scores, making it easy to visualize overly long sentences, difficult words, and kanji density.
Also supports furigana, word spacing, and summarization.
A single tool that combines features to help readers with features that support writers. Since AI processing is completed within the browser, you can use it without sending your text to external servers.