Help

Using Legibright

1. Open a file in Google Docs™, Slides or Sheets.
2. Open Legibright from the side panel on the right (the Legibright icon). The first time, Google asks you to allow it to read the open file.
3. Click Check. Fix what you can, Go to anything you want to fix yourself, and Check again.
4. Settings lets you choose the standard and switch best-practice tips on or off.

What Legibright checks

Each rule links to its own page with why it matters and how to fix it.

Problems

• Image has no alt text WCAG 1.1.1
• Heading level skipped WCAG 1.3.1
• Empty heading WCAG 1.3.1
• Text looks like a heading but is not one WCAG 1.3.1
• List typed by hand WCAG 1.3.1
• Merged cells WCAG 1.3.1
• Reading order differs from what you see WCAG 1.3.2
• Text contrast too low WCAG 1.4.3
• File has no real title WCAG 2.4.2
• Slide has no title WCAG 2.4.2
• Link text does not say where it goes WCAG 2.4.4
• Two slides share a title WCAG 2.4.6
• Sheet tab has a default name WCAG 2.4.6
• Document language not set WCAG 3.1.1

Check by hand

• Floating image: check alt text by hand WCAG 1.1.1
• Chart: check alt text by hand WCAG 1.1.1
• Table: check the header row by hand WCAG 1.3.1
• Colour may be the only way this text stands out WCAG 1.4.1

Best-practice tips

• Very small text
• Long passage in capitals
• Justified text
• Underlined text that is not a link

Where the rules come from

The rules come from WCAG (Web Content Accessibility Guidelines), published by the W3C. WCAG2ICT, also from the W3C, explains how WCAG applies to documents rather than web pages.

Each check is written to match the W3C's ACT rules and their pass and fail examples where one exists.

Countries point their laws at different WCAG versions. Legibright picks the version for your country automatically: WCAG 2.1 AA for the US ADA Title II rule and the EU (EN 301 549), WCAG 2.2 AA for UK and Australian public bodies, and WCAG 2.0 AA where the law still names it, such as Section 508, Canada, Israel and Japan. Anywhere else gets the newest version.

When the rules change

Each check shows its rules version, for example "Rules 2026.11". When WCAG or our understanding of a rule changes, we release a new version. Problems are re-checked against it the next time you click Check, and anything you marked as OK under the old version is shown again for one more look. Past reports keep the version they were made with.

Rules 2026.11

Still stuck? Email [email protected] and a person will reply.