Developer ToolsLive Tool100% Browser-Based
Class Diagram Maker
Draft Mermaid-compatible UML class diagrams with a browser-based editor and board preview.
Loading tool interface…
Related tools
Keep working in the same category with nearby utilities and calculators.
URL Encode/Decode
Encode and decode URLs with percent-encoding support.
JSON Formatter & Validator
Format, validate, and minify JSON with error highlighting.
HTML/XML Escape
Convert special characters to and from HTML entities.
CSS Minifier/Formatter
Minify or beautify CSS code for optimization.
JavaScript Minifier/Formatter
Minify or beautify JavaScript code for production.