Free online converters

Converts numbers to and from binary representations including IEEE 754 single and double.

Converts between Celsius and Fahrenheit with a thermometer graphic.

Converts Celsius temperatures to Fahrenheit with a conversion table.

Converts centimetres to inches and gives a quick reference table.

Converter and tables for a very wide set of weights and measures including uncommon units.

Converts CSV and Excel data to JSON, XML, SQL and other formats.

German-language unit and currency converter, also in French, Spanish, Portuguese, Japanese.

Converts between common kitchen measures such as cups, spoons and millilitres.

Converts cups to millilitres for cooking, with US and metric cup notes.

Converts currencies and lets you build a personalised table of exchange rates.

Converts a date and time from one time zone to others.

Converts RF power between dBm, dBW, microwatts, milliwatts, watts and kilowatts.

Converts between decibels and amplitude or power ratios.

Converts decimal numbers to binary.

Visual time zone converter that lines up cities on a scrollable timeline to find meeting times.

Converts amounts between many currencies using current exchange rates.

Converts Fahrenheit temperatures to Celsius with a chart.

Converts hexadecimal numbers to decimal.

Converts hexadecimal color codes to RGB values with a swatch.

Converts HTML email markup into plain text.

Converts a decimal number to its 32-bit IEEE 754 sign, exponent and mantissa.

Turns JPEG, PNG, GIF, WebP and SVG images up to 4 MB into Base64 strings ready to copy.

Converts images among JPEG, PNG, WebP, AVIF, HEIC, GIF, BMP, TIFF and ICO with batch support.

Converts inches to centimetres with a lookup table.