All developer tools
Every tool is free, works entirely in your browser, and never uploads your data.
50 tools
IP Subnet CalculatorFull IPv4 subnet report from any IP + netmask or prefix — including binary and hex representations.Web, Server & Code ToolsCSS Clamp GeneratorPopularFeaturedGenerate fluid clamp() CSS that scales any value smoothly between two viewport widths — with live preview.Web, Server & Code ToolsFluid Typography CalculatorBuild a complete fluid type scale — modular ratios at both viewport ends, output as CSS custom properties.Web, Server & Code ToolsSVG to CSS Data URIConvert SVG markup into an optimized CSS data URI — URL-encoded or base64, minified, with live preview and size readout.Web, Server & Code ToolsRegex Escape ToolEscape special characters so text matches literally in a regex — output for JavaScript, PHP or Python, plus unescape.Web, Server & Code ToolsInvisible Unicode Character DetectorPopularFeaturedFind zero-width spaces, BOMs, bidi controls and 50+ other invisible characters — highlighted, located, and removable in one click.Web, Server & Code ToolsBox Shadow GeneratorPopularFeaturedBuild layered CSS box shadows with live preview and copy-ready output.Web, Server & Code ToolsJavaScript Function GeneratorCreate clean JavaScript function templates with parameters, validation and documentation.Web, Server & Code ToolsCSS Gradient GeneratorPopularFeaturedCreate linear and radial CSS gradients with a live preview and reusable code.Web, Server & Code ToolsBorder Radius GeneratorDesign simple or asymmetric CSS border radii and preview the result instantly.Web, Server & Code ToolsText Shadow GeneratorBuild readable CSS text shadows with adjustable offsets, blur and color.Web, Server & Code ToolsCSS Filter GeneratorAdjust common CSS filter effects and copy the complete filter declaration.Web, Server & Code Tools