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Get Started


Install core and loader for any modules you would like to use.

Each format is published as a separate npm module.

yarn add
yarn add


You can import a loader and use it directly with parse. Note that parse can accept a fetch response object as the source of data to be parsed:

import {parse} from '';
import {CSVLoader} from '';
const data = await parse(fetch('data.csv'), CSVLoader);

You can register loaders after importing them

import {registerLoaders} from '';
import {CSVLoader} from '';

Then, in the same file (or some other file in the same app) that needs to load CSV, you no longer need to supply the loader to parse. It will autodetect the pre-registered loader:

import {parse} from '';

// The pre-registered CSVLoader gets auto selected based on file extension...
const data = await parse(fetch('data.csv'));


You can use your bundler of choice such as webpack or rollup. See the get-started examples for minimal working examples of how to bundle

Supporting Older Browsers is designed to leverage modern JavaScript (ES2018) and to optimize functionality and performance on evergreen browsers.

However, the default distribution is completely transpiled to ES5 so using with older or "slower moving" browsers such as IE11 and Edge is possible, assuming that the appropriate polyfills are installed.

To build on Edge and IE11, TextEncoder and TextDecoder must be polyfilled. There are several polyfills available on npm, but you can also use the polyfills provided by

yarn install
import '';

Supporting Node.js

A number of polyfills for fetch, TextEncoder etc are available to make work under Node.js, just install the module as described above.