ScreenLint - UI QA Scanner

About

ScreenLint helps frontend engineers, indie makers, designers, and product teams catch visible UI issues before publishing a landing page, shipping a feature, or taking launch screenshots.

Click the extension on any active web page to run a local scan for:

- Low text contrast
- Clipped or overflowing text
- Horizontal page overflow
- Small tap targets
- Missing image alt text
- Unlabelled controls and form fields
- Missing page title or document language
- Missing or duplicated H1 headings
- Large fixed or sticky overlays

ScreenLint returns a launch score, issue severity, CSS selector hints, and a copyable Markdown report for tickets, pull requests, QA notes, or launch checklists.

Privacy-first by design:

- No account required
- No page data uploaded
- No remote code
- No host permissions
- Runs only after the user clicks the extension

Sponsored placement disclosure:

- ScreenLint may show a clearly labelled Sponsored Pro Pass card inside the extension popup.
- Sponsored content is dismissible.
- ScreenLint does not inject ads into visited websites.
- ScreenLint does not use browsing history for ad targeting.