Documentation
Dev Docs - Offline documentation
Collection of Cheat Sheets
Code
Search code on multiple sources
Print code to image
Online IDE
Web Stuff
Can I use a feature?
Frontend code sandbox
What technology used on a website
HTTP Workflows
JS keycodes
Markdown
Editor
Table generator
Charts / Diagrams
Formatting
CyberChef - The Cyber Swiss Army Knife
Transform Tools
JSON
XML
HTML Minifier
JSON Validator
JSON to POCO