Embed Flatfile directly into any web application using our JavaScript SDK. This approach works with any framework or vanilla JavaScript setup.

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Installation

Add the Flatfile JavaScript SDK to your page: 
<script src="https://unpkg.com/@flatfile/javascript/dist/index.js"></script>
Or install via npm: 
npm install @flatfile/javascript

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Basic Implementation

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1. HTML Structure

Create a button to trigger the Flatfile embed: 
<!DOCTYPE html>
<html>
  <head>
    <title>Data Import</title>
    <script src="https://unpkg.com/@flatfile/javascript/dist/index.js"></script>
  </head>
  <body>
    <button id="import-btn">Import Data</button>

    <script>
      // Implementation goes here
    </script>
  </body>
</html>

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2. Initialize Flatfile

document.getElementById("import-btn").addEventListener("click", function () {
  window.FlatFileJavaScript.startFlatfile({});
});

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3. Get Your Credentials

publishableKey: Get from Platform Dashboard → Developer Settings 
document.getElementById("import-btn").addEventListener("click", function () {
  window.FlatFileJavaScript.startFlatfile({
    publishableKey: "pk_your_publishable_key",
  });
});
For detailed authentication and security guidance, see Advanced Configuration.

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Complete Example

The example below will open an empty space. To create the sheet your users should land on, you’ll want to create a workbook as shown further down this page.
<!DOCTYPE html>
<html>
  <head>
    <title>Data Import</title>
    <script src="https://unpkg.com/@flatfile/javascript/dist/index.js"></script>
  </head>
  <body>
    <h1>Welcome to our app</h1>
    <button id="import-btn">Import Data</button>

    <script>
      document
        .getElementById("import-btn")
        .addEventListener("click", function () {
          window.FlatFileJavaScript.startFlatfile({
            publishableKey: "pk_your_publishable_key",
            displayAsModal: true,
          });
        });
    </script>
  </body>
</html>

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Creating New Spaces

To create a new Space each time:
  1. Add a workbook configuration object. Read more about workbooks here.
  2. Optionally deploy a listener for custom data processing. Your listener will contain your validations and transformations
You can also deploy and create your workbook via a server-side listener as shown in the above link, rather than passing it in as a client-side property.
window.FlatFileJavaScript.startFlatfile({
  publishableKey: "pk_your_publishable_key",
  workbook: {
    name: "My Import",
    sheets: [
      {
        name: "Contacts",
        slug: "contacts",
        fields: [
          { key: "name", type: "string", label: "Name" },
          { key: "email", type: "string", label: "Email" },
        ],
      },
    ],
  },
});
For detailed workbook configuration, see the Workbook API Reference.

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Configuration Options

For complete configuration options including user identity, theming, and advanced features, see Advanced Configuration.

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Reusing Existing Spaces

To reuse an existing space, you need to set up a server-side component that retrieves the space access token. The basic client-side approach shown above only works for initial space creation. For space reuse, you’ll need:
  1. Server-side setup: Use your secret key to retrieve the space and its access token
  2. Client-side update: Use the access token instead of just the publishable key
// Client-side: Get space data from your server
const spaceData = await fetch("/api/spaces/us_sp_your_space_id").then((r) =>
  r.json()
);

// Use the space with access token
window.FlatFileJavaScript.startFlatfile({
  space: {
    id: spaceData.id,
    accessToken: spaceData.accessToken, // Retrieved from server
  },
});
For complete server-side implementation, see Server Setup.

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Next Steps

  • Advanced Configuration: See Advanced Configuration for complete options reference
  • Server Setup: Set up Server Setup for space reuse functionality
  • Styling: Customize the embedded experience in your Platform Dashboard Space settings
  • Data Processing: Set up Listeners in your Space for custom data transformations
  • API Integration: Use Flatfile API to retrieve processed data

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Example Projects

Basic JavaScript Example

Complete working example with HTML and JavaScript