xClean Tools
⌘K
Developer links
AI assistants
ChatGPT
OpenAI's assistant
Claude
Anthropic's assistant
Gemini
Google's assistant
Perplexity
AI answer engine with citations
GitHub Copilot
AI pair programmer
References
MDN Web Docs
The web platform reference
Can I Use
Browser support tables
DevDocs
Offline-capable API docs
web.dev
Performance and best practices
Utilities
regex101
Regex tester with explanations
crontab.guru
Cron expression editor
Excalidraw
Hand-drawn style diagrams
Carbon
Code screenshots
Bundlephobia
npm package size cost