Free Developer tools
Nothing goes out of your device.
26 tools
- JSON FormatterPretty-print JSON with consistent indentation.
- JSON MinifierRemove insignificant whitespace from valid JSON.
- JSON ValidatorCheck JSON syntax and identify its root value type.
- JSON ViewerInspect safely rendered, formatted JSON as plain text.
- JSON to XMLConvert JSON values into escaped, well-formed XML.
- URL EncoderPercent-encode text for a URL component.
- URL DecoderDecode a percent-encoded URL component.
- HTML Entity EncoderEscape text for display in HTML source.
- HTML Entity DecoderDecode common named and numeric entities to inert text.
- Base64 EncoderEncode Unicode text as UTF-8 Base64.
- Base64 DecoderDecode Base64 bytes as validated UTF-8 text.
- QR Code GeneratorRender text or a URL as a downloadable QR code locally.
- HEX to RGBConvert a three- or six-digit HEX color to RGB.
- RGB to HEXConvert RGB channel values to a six-digit HEX color.
- RGB to HSLConvert RGB channels to hue, saturation, and lightness.
- HSL to RGBConvert hue, saturation, and lightness to RGB.
- HEX to HSLConvert a HEX color directly to HSL.
- HSL to HEXConvert an HSL color directly to HEX.
- CSV, TSV, JSON & table converterConvert structured tables between CSV, TSV, JSON, and Markdown.
- JSON diffCompare two JSON documents after stable key ordering.
- JWT inspectorDecode JWT headers, claims, and timestamps without executing or uploading them.
- Regex tester & replacerTest patterns and replacements in a disposable, time-limited worker.
- Unix time & timezone converterConvert Unix timestamps and ISO dates with timezone-aware output.
- URL & query inspectorInspect URL components and repeated query parameters safely.
- WCAG contrast checkerMeasure text contrast and check WCAG AA and AAA thresholds.
- Markdown workbenchWrite Markdown with a sanitized live preview and export safe HTML or plain text.