Unit, data format, and text converters

Two different kinds of conversion live here. One is measurement — units, currency, height, timezones, data sizes — where you want a number in different terms. The other is data format, where the same information has to be re-expressed as JSON, CSV, XML, YAML, or Markdown so another program will accept it. Both are instant and neither needs an account.

All 20 Converters

Unit ConverterConvert length, weight, temperature and more.Height ConverterConvert height between centimeters and feet & inches instantly.Currency ConverterConvert between world currencies.JSON to CSVConvert JSON data to CSV format.CSV to JSONConvert CSV files to JSON format.XML to JSONConvert XML data to JSON format.Markdown to HTMLConvert Markdown text to HTML.HTML to MarkdownConvert HTML to Markdown format.Number to WordsConvert numbers into written words.Words to NumberConvert written words back to numbers.Binary ConverterConvert binary, decimal, hex, octal.Timestamp ConverterConvert between Unix timestamps and human-readable dates.Timezone ConverterConvert a date and time across multiple time zones.YAML to JSONConvert YAML to JSON and JSON back to YAML.Data Storage ConverterConvert between bytes, KB, MB, GB, and TB.Roman Numeral ConverterConvert numbers to Roman numerals and back.JSON to XMLConvert JSON data to XML format.Slug GeneratorConvert text into a clean, URL-friendly slug.ASCII ConverterConvert text to ASCII hex, binary, and decimal codes.Markdown Table GeneratorConvert comma-separated data into a Markdown table.

Which one do you need?

The tools above overlap in places. This is the quickest way to pick the right one.

You need length, weight, temperature, area, or speed: Unit ConverterOne page for the everyday measurement conversions instead of a separate tool each.
You need a rate between world currencies: Currency ConverterUses live reference rates rather than a stale built-in table.
You are scheduling across regions: Timezone ConverterHandles the daylight-saving offsets that make manual arithmetic wrong twice a year.
You want API data in a spreadsheet: JSON to CSVFlattens the structure into rows and columns Excel and Sheets will open.
You are feeding spreadsheet data into code: CSV to JSONThe reverse trip, with your header row becoming the object keys.
You are moving between config formats: YAML to JSONSame data, different syntax — useful when a tool accepts only one of them.
You have a Unix timestamp in a log or database: Timestamp ConverterTurns 1735689600 into a date you can read, and back again.
You need binary, hex, octal, decimal, or text: Binary ConverterAll five at once, exact at any size, with the arithmetic shown.

Frequently asked questions

Are the currency rates live?

They come from a live reference feed rather than a fixed table, so they track the market closely. They are indicative mid-market rates — a bank or card issuer will apply its own spread, so what you actually pay will differ slightly.

What is the difference between JSON, CSV, XML, and YAML?

They are four ways of writing down the same kind of structured data. CSV is a flat table and is what spreadsheets read. JSON is the default for web APIs and handles nesting. XML is older, more verbose, and still common in enterprise systems. YAML is designed to be comfortable for humans to edit and is used mostly for configuration files.

Will converting nested JSON to CSV lose information?

It can. CSV has no way to express nesting, so deeply structured objects and arrays have to be flattened or dropped. Flat, uniform records convert cleanly; complex nested documents do not fully survive the trip.

Does converting happen on your servers?

The format converters run in your browser, so your data stays on your device. Currency and translation lookups have to call an external rate or language service, since the values are not something a browser can know on its own.