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Generate PDF From HTML File - C#

PDF from HTML (HTML to PDF) sample in C# demonstrating ‘Generate PDF From HTML File’

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace ByteScoutWebApiExample
    class Program
        // The authentication key (API Key).
        // Get your own by registering at
        const String API_KEY = "******************************";

        static void Main(string[] args)
            // HTML input
            string inputSample = File.ReadAllText(@".\sample.html");

            // Destination PDF file name
            string destinationFile = @".\result.pdf";

            // Create standard .NET web client instance
            WebClient webClient = new WebClient();

            // Set API Key
            webClient.Headers.Add("x-api-key", API_KEY);
            // Set JSON content type
            webClient.Headers.Add("Content-Type", "application/json");

                // Prepare requests params as JSON
                // See documentation:
                Dictionary<string, object> parameters = new Dictionary<string, object>();

                // Input HTML code to be converted. Required. 
                parameters.Add("html", inputSample);

                // Name of resulting file
                parameters.Add("name", Path.GetFileName(destinationFile));

                // Set to css style margins like 10 px or 5px 5px 5px 5px.
                parameters.Add("margins", "5px 5px 5px 5px");

                // Can be Letter, A4, A5, A6 or custom size like 200x200
                parameters.Add("paperSize", "Letter");

                // Set to Portrait or Landscape. Portrait by default.
                parameters.Add("orientation", "Portrait");

                // true by default. Set to false to disbale printing of background.
                parameters.Add("printBackground", true);

                // If large input document, process in async mode by passing true
                parameters.Add("async", false);

                // Set to HTML for header to be applied on every page at the header.
                parameters.Add("header", "");

                // Set to HTML for footer to be applied on every page at the bottom.
                parameters.Add("footer", "");

                // Convert dictionary of params to JSON
                string jsonPayload = JsonConvert.SerializeObject(parameters);

                // Prepare URL for `HTML to PDF` API call
                string url = "";

                // Execute POST request with JSON payload
                string response = webClient.UploadString(url, jsonPayload);

                // Parse JSON response
                JObject json = JObject.Parse(response);

                if (json["error"].ToObject<bool>() == false)
                    // Get URL of generated PDF file
                    string resultFileUrl = json["url"].ToString();

                    webClient.Headers.Remove("Content-Type"); // remove the header required for only the previous request

                    // Download the PDF file
                    webClient.DownloadFile(resultFileUrl, destinationFile);

                    Console.WriteLine("Generated PDF document saved as \"{0}\" file.", destinationFile);
            catch (WebException e)


            Console.WriteLine("Press any key to exit...");

<!DOCTYPE html>
<html xmlns="" lang="" xml:lang="">

	<title>TODO List</title>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

	<h1>TODO List</h1>
			Wash the car
			Do the dishes
			Walk the dog
			Buy A4 papers

</html> Web API: the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.

Get your API key here!

Download Source Code (.zip)

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