All tools

Convert meters, feet, miles, inches and more — instantly.

Convert kg, lb, oz, stones and tonnes instantly.

Convert Celsius, Fahrenheit, Kelvin and Rankine.

Liters, gallons, cups, fl oz, pints and more.

km/h, mph, m/s, knots and feet per second.

Convert seconds, minutes, hours, days, weeks, years.

Convert degrees, radians, gradians and turns.

Hz, kHz, MHz, GHz, RPM and BPM.

Square meters, feet, acres, hectares and more.

Joules, kWh, calories, BTU, electronvolts.

Watts, kilowatts, horsepower, BTU/h.

Pascals, bar, psi, atmospheres, mmHg, torr.

Bytes, KB, MB, GB, TB, PB — decimal and binary.

Real-time exchange rates for 30+ world currencies — free.

Real-time Bitcoin, Ethereum and top coin prices.

Hourly to annual, monthly, weekly and daily.

Convert times between any two timezones.

Unix timestamps ↔ human-readable dates.

Convert JSON to XML or XML to JSON — both directions.

Turn CSV into JSON or JSON into CSV — both directions.

Convert YAML to JSON or JSON to YAML — both directions.

Convert JSON arrays to Excel or Excel sheets to JSON.

camelCase, snake_case, kebab-case and more.

Convert HTML to Markdown or Markdown to HTML — both directions.

Encode and decode Base64 — Unicode-safe.

Convert between hex, binary, octal and decimal.

HEX, RGB, HSL and modern OKLCH — instantly.

Check WCAG AA / AAA contrast — pass or fail.

Closest Tailwind class for any HEX color.

Drop an image, extract its palette.

Linear, radial and conic CSS gradients.

Visual CSS box-shadow editor.

Per-corner CSS border-radius editor.

Design CSS easing curves visually.

Convert px, rem, em, pt and more.

Compute ratios and resize dimensions.

Convert PNG, JPG and WebP — in your browser.

Render SVG markup to a high-resolution PNG.

Convert CSV to .xlsx or Excel back to CSV — both directions.