How to Generate PDF in Flutter

To Generate PDF documents in Flutter can be achieved through several packages. Here are a few popular ones:

1. pdf: This package provides a simple way to create and manipulate PDF documents in Dart.
2. syncfusion_flutter_pdf: This package provides a comprehensive set of features for generating and manipulating PDF documents. https://pub.dev/packages/syncfusion_flutter_pdf The also have a lot of widget components thay may be used for free up until a moment you have enough money to pay them back https://www.syncfusion.com/sales/communitylicense

Here’s an example using the pdf package to generate a simple PDF:

First, add the following dependency to your pubspec.yaml file:

dependencies:
  pdf: ^3.11.3

Then, run flutter pub get to install the package.

Now, you can use the following code to generate a PDF:

import 'dart:io';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:pdf/widgets.dart' as pw;

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) => MaterialApp(
      home: MyHomePage(),
    );
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key});

  @override
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: Text('Generate PDF'),
        ),
        body: Center(
          child: ElevatedButton(
            onPressed: () async {
              final pdf = pw.Document();
              pdf.addPage(pw.Page(
                build: (context) {
                  return pw.Column(
                    children: [
                      pw.Text('Hello, World!',
                          style: pw.TextStyle(fontSize: 24)),
                      pw.SizedBox(height: 20),
                      pw.Text('This is a sample PDF generated by Flutter.',
                          style: pw.TextStyle(fontSize: 18)),
                    ],
                  );
                },
              ));
              final bytes = await pdf.save();
              saveAndShareFile(bytes, 'sample.pdf');
            },
            child: Text('Generate PDF'),
          ),
        ),
      );

  void saveAndShareFile(List<int> bytes, String filename) async {
    final file = await File(filename).create();
    await file.writeAsBytes(bytes);
    if (kDebugMode) {
      print('PDF saved to $filename');
    }
  }
}

This code will generate a simple PDF with two lines of text and save it to the device’s storage. The saveAndShareFile function is used to create a file and write the PDF bytes to it.

Another Packages that may be mentioned here are:

1. printing. This package allows you to print documents, including generating PDFs. It is a common in all printing to pdf on all operating systems, office software, etc – to have the feature “print to PDF“.
2. flutter_pdfview: This package allows you to view PDFs in your Flutter app.

If you need to render HTML, not PDFs, you could read how to do it here: https://programtom.com/dev/2024/12/28/flutter-html/