Developer Tools
Web-based utilities for development and productivity
Data & Encoding
🔐
JWT Decoder
Decode and inspect JSON Web Tokens
📝
Base64 Encode/Decode
Convert text to and from Base64
📋
JSON Formatter
Format and validate JSON data
🔒
Certificate Decoder
Decode and inspect SSL certificates
Diagrams & Visualization
📊
Sequence Diagrams
Create interactive sequence diagrams
📦
Block Diagrams
Draw system architecture diagrams
✏️
Excalidraw
Collaborative whiteboard for sketching
Productivity & Planning
💪
Workout Creator
Plan and track fitness routines
❤️
Heart Rate Zone Calculator
Calculate training zones from max heart rate
📅
Printable Calendar
Generate calendars for habit tracking
💰
Compound Interest Calculator
Calculate compound interest with contributions