Web Developer Checklist

ASP.NET

Best practices

Fix broken links◄
- W3C link checker
- iWebTool Broken Link Checker
Spell-check◄
Check website in all browsers◄
Remove 'www' subdomain◄
- no-www.org score of 'B'
- Remove 'www' in web.config

Mobile

MobileOK score of 75+◄
- W3C mobile checker
Use 'viewport' meta-tag◄
- Don’t Forget the Viewport Meta Tag
- Make your website mobile friendly
Use correct input types◄
Manual check using emulators◄
- 6 free mobile emulators
- Opera Mobile Emulator

Analytics

Uptime monitoring◄
Traffic analysis◄

Performance

Run in Release Mode◄
- Release Mode and Retail switch
Google Page Speed score of 90+◄
- Google Page Speed
Yahoo YSlow score of 85+◄
- Yahoo's YSlow
- Remove ETags in ASP.NET
Optimize HTTP headers◄
- redbot.org
Optimize images◄

Usability

HTML5 compatibility check◄
Custom 404 page◄
- A more useful 404
- Custom error pages in ASP.NET
Favicon◄
Use friendly URLs◄
- 11 best practices for URLs
- URL rewriting in IIS
Add search feature◄
- Google Custom Search
- Consider 'Open Search'
Environment Integration◄

Accessibility

Accessibility validation◄
Color contrast◄
- Check color contrast online
WAI-ARIA Landmarks◄

SEO

SenSEO score of 85+◄
- SenSEO for Firefox
- SEO toolkit for IIS
Google Rich Snippets◄
- Online tester
- Getting started
robots.txt◄
XML sitemap◄
- Create sitemap online
- Sitemap.xml using ASP.NET MVC

Code quality

HTML validation◄
- W3C HTML validator
- Dr. Watson
CSS validation◄
- W3C CSS validator
World ready◄
- W3C i18n checker
Run CSS Lint◄
Run JSLint/JSHint◄

Semantics

Add meaning with Microdata◄
- Schema.org reference
- Schema-Creator.org
Check the semantics◄
- W3C semantic extractor

Security

Follow best practices◄
Cross-site scripting◄
Cross-site request forgery◄
Secure connection (SSL)◄
HTTP Strict Transport Security◄
- MDN Overview
- OWASP Overview

Social Media

Open Graph protocol◄
- Open Graph protocol reference
Twitter Cards◄
- Documentation
- Preview Tool
Facebook Insights◄
- Facebook Insights

...and finally

Add humans.txt◄
- We are humans, not machines!

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