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Create PDFs from HTML in Flutter

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PDF generation is available only on the legacy method-channel API (package:nutrient_flutter/nutrient_flutter.dart), which is deprecated in Nutrient Flutter SDK 6. The APIs on this page aren’t part of the bindings API yet. They still work in SDK 6; import the legacy library to use them alongside bindings.dart if you use both. Nutrient plans to add a bindings equivalent. In the meantime, refer to the platform adapters guide to use native processors. For details, refer to the Flutter SDK 6 migration guide.

The Nutrient(opens in a new tab) API creates PDF files from HTML strings and Uniform Resource Identifiers (URIs). On Android, Nutrient uses the WebView(opens in a new tab) system. On iOS, Nutrient uses WebKit(opens in a new tab). Because these platform systems perform the conversion, Nutrient can’t support every conversion issue, including WebView(opens in a new tab) or WebKit(opens in a new tab) bugs.

The following examples show how to generate a PDF from an HTML string and a URI or URL.

License

To generate a PDF from HTML, contact Sales to add HTML-to-PDF conversion to your license.

Generate a PDF from an HTML string

The following example generates a PDF from an HTML string:

const html = '''
<html>
    <head>
        <style type="text/css">
            h1 {
                color: red;
            }
        </style>
    </head>
    <body>
        <h1>Hello, world!</h1>
    </body>
</html>
''';


// Writable output path.
final outputFilePath = '<writable-output-file-path>'


// Generate the PDF from the HTML string.
String? generatedPdf = await Nutrient.generatePdfFromHtmlString(html, outputFilePath);
if (generatedPdf == null) {
    print('Failed to generate PDF from HTML string.');
    return;
}


// Display the generated PDF.
await Nutrient.present(generatedPdf);

Generate a PDF from an HTML URL or URI

The following example generates a PDF from an HTML URL or URI:

// Writable output path.
final htmlUrl =  Uri.parse('https://nutrient.io');
final outputFilePath = <writable-output-path>;


   // Generate the PDF from the HTML URL.
   String? generatedPdf = await Nutrient.generatePdfFromHtmlUri(htmlUri, outputFilePath);


   if (generatedPdf == null) {
   print('Failed to generate PDF from HTML URI.');
   return;
   }


   // Display the generated PDF.
   await Nutrient.present(generatedPdf);

For more information about generating PDF files from HTML strings and URLs, refer to the Nutrient(opens in a new tab) API reference and the PDF generation example(opens in a new tab) from the Catalog app(opens in a new tab).