Web Developer Checklist

Get the Chrome extension

Best practices

Fix broken links◄
- W3C link checker
- iWebTool Broken Link Checker
Spelling and grammar◄
Check website in all browsers◄
Decide on www-subdomain◄

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◄
- Input type: Email, Url, Phone
- Diving in to HTML5 forms
Manual check using emulators◄
Test using real devices◄
- Use Open Device Labs to test multiple devices

Analytics

Uptime monitoring◄
- Uptime robot
- GotSiteMonitor.com
Traffic analysis◄

Performance

Google Page Speed score of 90+◄
- Google Page Speed
Yahoo YSlow score of 85+◄
- Yahoo's YSlow
Optimize HTTP headers◄
- redbot.org
Optimize images◄

Usability

HTML5 compatibility check◄
Custom 404 page◄
- A more useful 404
Favicon◄
- Real Favicon Generator
- Favicon Cheat Sheet
Use friendly URLs◄
Print-friendly CSS◄
- Set up a print stylesheet
Add search feature◄
- Google Custom Search
- Consider 'Open Search'
Environment Integration◄

Semantics

Add meaning with structured data◄
- Schema.org reference
- Schema-Creator.org
Check the semantics◄

SEO

SenSEO score of 85+◄
- SenSEO for Firefox
Google Rich Snippets◄
- Online tester
- Getting started
robots.txt◄
- robots.txt tutorial
- Create robots.txt online
XML sitemap◄
- Create sitemap online

Code quality

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

Accessibility

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

Security

Follow best practices◄
Cross-site scripting◄
Cross-site request forgery◄
- Explanation and walkthrough
- CSRF cheat sheet
Secure connection (SSL)◄
HTTP Strict Transport Security◄
- MDN Overview
- OWASP Overview
Enable Content Security Policy◄

Social Media

Open Graph protocol◄
- Open Graph protocol reference
Twitter Cards◄
- Documentation
Facebook Insights◄
- Facebook Insights
Google+◄
- Google+ Authorship
- Google+ Publisher

...and finally

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

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