# For Developers

**Source**: https://accessibility.web-resources.upenn.edu/resources/developers
**Parent**: https://accessibility.web-resources.upenn.edu/get-help

## Browser extensions, tools, and software:

- [WAVE extension(link is external)](https://wave.webaim.org/extension/)
- [Chris Pederick's Web Developer tools(link is external)](https://chrispederick.com/work/web-developer/)
- [The Contrast Triangle for Link Contrast(link is external)](https://contrast-triangle.com/)
- [Colour Contrast Analyzer Standalone App(link is external)](https://developer.paciellogroup.com/resources/contrastanalyser/)
- [Accessible Color Recommendations(link is external)](https://accessible-colors.com/)

## General resources:

- [HTML5 Accessibility Support Status(link is external)](https://www.html5accessibility.com/)
- [Adventurer's Guide to W3C Specs(link is external)](https://www.24a11y.com/2019/an-adventurers-guide-to-w3c-specs/)
- [WCAG 2.1 Checklist with Filters and Links(link is external)](https://codepen.io/weboverhauls/full/zYvopYE)
- [Will your code work with assistive technologies?(link is external)](https://a11ysupport.io/)
- [Barclay's Accessibility Design Standards for Mobile-based systems(link is external)](https://home.barclays/content/dam/home-barclays/documents/who-we-are/our-suppliers/Mobile-Based-Design-Standards-Suppliers-2018.pdf)
- [Understanding Web Accessibility Color Contrast Guidelines and Ratios(link is external)](https://css-tricks.com/understanding-web-accessibility-color-contrast-guidelines-and-ratios/)
- [CSS can influence screen readers(link is external)](https://blog.benmyers.dev/css-can-influence-screenreaders/)

## ARIA

- [What the Heck is ARIA? A Beginner's Guide to ARIA for Accessibility(link is external)](https://www.lullabot.com/articles/what-heck-aria-beginners-guide-aria-accessibility)
- [ARIA labels(link is external)](https://amberwilson.co.uk/blog/aria-labels/)
- [WAI-ARIA Cheat Sheet by Digital A11Y(link is external)](https://www.digitala11y.com/wai-aria-1-1-cheat-sheet/)
- [ARIA Cheat Sheet by Steven Roberts(link is external)](https://codepen.io/matchboxhero/post/aria-cheatsheet)
- [felipelinhares WAI-ARIA Guide(link is external)](https://github.com/filipelinhares/WAI-ARIA-cheatsheet)

## Code examples:

- [A11Y Style Guide by Carie Fischer(link is external)](https://a11y-style-guide.com/style-guide/)
- [Bits of Code's Accessibility Cheat Sheet(link is external)](https://bitsofco.de/the-accessibility-cheatsheet/)