Developer Tools
JSON to TypeScript Interface Generator
Convert JSON objects to TypeScript interfaces and type definitions instantly. Supports nested objects, arrays, optional fields, and union types.
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Chmod Calculator
Calculate Unix file permissions visually. Click checkboxes to set read/write/execute for owner, group, and others. Shows octal and symbolic notation.
CSS Specificity Calculator
Calculate CSS selector specificity and understand which styles take precedence. Supports ID, class, attribute, pseudo-class, element, and pseudo-element selectors.
CSS Unit Converter
Convert between CSS units: px, rem, em, pt, vw, vh. Set custom base font size and viewport width.