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    1.1.1 • Public • Published


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    A tiny currency formatting library for JavaScript.

    • Small. Dependency-free. ~500 bytes minified and gzipped. Controlled by Size Limit.
    • Functional. The function is automatically curried (think Ramda).
    • Flexible. It can be tweaked to present any modern currency.
    import prettyMoney from "pretty-money";
    let price = prettyMoney({ currency: "EUR" }, 10000); //=> "10000 EUR"

    Works in any environment, be that Node.js or a browser. Try it yourself!


    pretty-money is available on NPM, so you can install it your usual way:

    npm install pretty-money
    # or
    yarn add pretty-money

    If you only need to use pretty-money on the client side, you can install the latest version with jsDelivr:

    <script src=""></script>

    In modern browsers, you can use:

    <script type="module">
      import prettyMoney from ""


    There are two ways to use pretty-money: traditional and functional.

    Traditional way is to call the function with two parameters: the config object and the number you need to format:

    const prettyDollarConfig = {
        currency: "$",
        position: "before",
        spaced: false,
        thousandsDelimiter: ","
    const priceA = prettyMoney(prettyDollarConfig, 1234); //=> "$1,234"
    const priceB = prettyMoney(prettyDollarConfig, 567.89); //=> "$567.89"

    Functional way is to curry the function, i.e. to create a function with a set config and to later call it with only one parameter — the number to format:

    const prettyEuro = prettyMoney({
        currency: "€",
        decimals: "fixed",
        decimalDelimiter: ",",
        thousandsDelimiter: "."
    const priceA = prettyEuro(1234); //=> "1.234,00 €"
    const priceB = prettyEuro(567.89); //=> "567,89 €"

    You can read more about the available configuration parameters in the next section, Config.



    Type: string
    Default: ""

    The string to be used as currency symbol.
    It can be a respective sign (like "$"), currency code (like "GBP") or a word (like "peso").


    Type: string
    Default: "."

    The string that separates the integer and the fractional parts of the number.


    Type: number
    Default: 2

    The maximum number of decimal places allowed in the number.


    Type: number
    Default: 0

    The minimum number of decimal places allowed in the number. Has no effect when decimals is set to "fixed".


    Type: string
    Values: "fixed", "fluid" or "minmax"
    Default: "minmax"

    Sets the strategy to calculate the amount of decimal places.

    • "fixed" — the amount of places will always stay at maxDecimal. minDecimal has no effect.
    • "fluid" — the amount of places will stay at any number between minDecimal and maxDecimal, in order not to have trailing zeros.
    • "minmax" — the amount of places will stay at maxDecimal unless it's possible to be at minDecimal without having trailing zeros.


    Type: string
    Values: "before" or "after"
    Default: "after"

    Sets the position of the currency symbol with respect to the number.


    Type: boolean
    Default: true

    Sets whether there should be a space between the number and the currency symbol.


    Type: string
    Default: ""

    A string that separates the thousands of the number.

    Difference from toLocaleString

    ECMAScript's Number has a method toLocaleString, which has a similar idea. It too can be used to format numbers as financial values, and it even has a lot of built-in locales. However, the output of it is different on different Node.js versions and browsers:

    let price = (10000).toLocaleString("ru", {
        style: "currency",
        currency: "RUB"
    //=> "10 000,00 ₽"    in modern browsers
    //=> "RUB 10,000.00"  in Node v12.13.0
    //=> "RUB 10,000"     in Node v4.8.6

    This can lead to unexpected output and difficulties in debugging.

    While pretty-money doesn't have any locales built-in, it provides a flexible API, so that the end user can compose any currency formatting function they need.

    let price = prettyMoney({
        currency: "₽",
        thousandsDelimiter: " "
    }, 10000);
    //=> "10 000 ₽"       in every Node, in every browser


    If you want to improve pretty-money, create your own fork of it or just play around with the developer build, here's all you need to know:

    • yarn dev to start a dev server, which will automatically build the library after you change the source and output it to ./dist/
    • yarn build to build the production-ready minified version of the library and output it to ./dist/
    • yarn test to build the project and run all tests, which include:
      • yarn test:lint to check the code formatting with ESLint (this won't auto fix errors)
      • yarn test:unit to run the uvu unit tests and calculate coverage
      • yarn test:size to check the size

    There are no peer dependencies and other extra requirements. Any help is welcome when it keeps things simple and small.


    MIT © 2019-2021 Nikita Karamov


    npm i pretty-money

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