Free Utilities

Developer
Tools

Free, client-side utility tools for developers, designers, and everyday use. No data leaves your browser.

Einbürgerung & MoreResources for becoming a German citizen — the naturalization test (Einbürgerungstest), the "Leben in…
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Developer & Code

JSON ↔ CSV ConverterConvert between JSON and CSV formats instantly.→
Base64 Encoder / DecoderEncode or decode Base64 strings and images.→
Regex Tester & ExplainerTest regular expressions with real-time matching.→
JWT DecoderDecode and inspect JSON Web Token payloads.→
CSS Minifier / Un-minifierCompress or expand CSS code.→
URL Encoder / DecoderEncode or decode URLs, query parameters, and path segments.→
JSON FormatterBeautify, minify, and validate JSON data.→
YAML ↔ JSON ConverterConvert between YAML and JSON formats.→
XML Formatter / ValidatorPretty-print and validate XML documents.→
HTML Entity Encoder / DecoderConvert between HTML entities and characters.→
HTML ↔ JSX ConverterConvert between plain HTML and JSX/TSX syntax.→
Hash GeneratorGenerate SHA-256, SHA-1, or MD5 hashes in-browser.→
UUID GeneratorGenerate bulk v4 UUIDs for testing and development.→
Cron Expression ParserType a cron expression and see the human-readable schedule.→
Regex Cheat SheetSearchable regex reference with live examples.→
SQL FormatterPretty-print and format SQL queries.→

Design & Front-End

CSS Gradient GeneratorBuild beautiful CSS gradients with live preview.→
Box Shadow / Border RadiusVisually design CSS shadows and rounded corners.→
Color Palette & Contrast CheckerTest color contrast for WCAG accessibility compliance.→
CSS Flexbox GeneratorVisual flexbox layout builder with live preview.→
CSS Grid GeneratorVisual CSS Grid template builder.→
CSS Animation GeneratorBuild CSS keyframe animations visually.→
Color Palette GeneratorGenerate harmonious color palettes from a base color.→

Text & Office

Word & Character CounterCount words, characters, sentences, and reading time.→
Diff CheckerCompare two texts and highlight differences line by line.→
Markdown Live PreviewWrite Markdown and see formatted HTML in real time.→
Lorem Ipsum GeneratorGenerate placeholder text with custom word count.→
HTML PreviewerWrite HTML and CSS, see live rendered output.→
SVG PreviewerWrite SVG markup and see live rendering.→
HTML to ImageRender HTML to canvas and download as PNG.→
Timestamp ConverterConvert between Unix timestamps and human-readable dates.→