Developer Tools
Regex tester, URL encoder, CSS generators, and more.
Regex Tester
Test regular expressions and find all matches with positions in your text.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa, in multiple formats.
JSON to TypeScript
Convert a JSON object into TypeScript interface definitions, handling nested objects and arrays.
HTML to JSX
Convert HTML markup to JSX-compatible React syntax (className, htmlFor, self-closing tags, style objects).
chmod Calculator
Convert between numeric (755) and symbolic (rwxr-xr-x) Unix file permission formats with full explanation.
Meta Tag Generator
Generate complete HTML head meta tags including SEO, Open Graph, and Twitter Card tags.
CSS Gradient Generator
Generate CSS linear-gradient code from two colors and an optional direction or angle.
HTTP Status Codes
Look up HTTP status codes by number or keyword, with descriptions and common use cases.
CSS Box Shadow Generator
Generate CSS box-shadow code from offset, blur, spread, and color parameters.
CSS Flexbox Generator
Generate complete CSS flexbox code from direction, justify, align, wrap, and gap parameters.
Favicon Generator
Resize any image to a 32×32 PNG favicon ready for web use.
JSON Validator
Validate JSON and get a formatted, pretty-printed version or a detailed error with line number.
CSS Unit Converter
Convert CSS values between px, rem, em, pt, and vw units.
Color Contrast Checker
Check WCAG AA/AAA contrast ratio between foreground and background colors.
SVG Optimizer
Remove comments, metadata, empty groups, and unnecessary attributes to reduce SVG file size.