MarkupLint
Instant HTML validation for web developers. Check markup quality offline by AIO.com.ai
As of June 2026, MarkupLint has 3 users in the Productivity category.
Usersup 50.0 percent+50.0%
3
3
Ratingno change0%
—
— reviews
Reviewsno change0%
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Version
1.0.0
Manifest V3
History
3 snapshotsTracking since Apr 18, 2026.
View as table
| Date | Users | Rating | Reviews | Version |
|---|---|---|---|---|
| Apr 18, 2026 | 2 | — | — | 1.0.0 |
| Apr 28, 2026 | 2 | — | — | 1.0.0 |
| May 22, 2026 | 2 | — | — | 1.0.0 |
| Now | 3 | — | — | 1.0.0 |
Permissions & access
- Permissions
- activeTabscripting
- Host access
- None declared
Screenshots
About
MarkupLint is a powerful HTML validation extension for web developers and designers. Instantly analyze any webpage's HTML structure, accessibility, and semantic markup quality without leaving your browser. Press Alt+Shift+V or click the toolbar icon to validate the current page. Results appear in the browser console with color-coded issues, warnings, and suggestions. Features include DOCTYPE validation, heading hierarchy checks, accessibility audits, duplicate ID detection, and semantic HTML5 verification. Works 100% offline with no external requests. Perfect for debugging, learning web standards, and ensuring clean, valid HTML markup. Developed by AIO.com.aiRetry
Technical
- Version
- 1.0.0
- Manifest
- V3
- Size
- 26.52KiB
- Min Chrome
- 88
- Languages
- 8
- Featured
- No
Metadata
- ID
- lpmlpliffjfpnmoiimipocpodpgdhgob
- Developer ID
- u01d1228660add78b720553c4b6e00c76
- Developer Email
- [email protected]
- Created
- Oct 29, 2025
- Last Updated (Store)
- Oct 29, 2025
- Last Scraped
- Jun 4, 2026
- Website
- —
- Support URL
- —
- Privacy Policy
- —
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Data sourced from the Chrome Web Store · last verified Jun 4, 2026.