An HTML to PDF API enables you to get out-of-the-box document rendering for your software. Instead of tedious custom development and studying tons of PDF specifications, you enjoy a ready solution. The HTML to PDF API easily connects with your systems to automatically convert HTML to PDF in high quality.

Can every software be integrated with the HTML to PDF API? No, the rendering engine has its limitations.

Only certain programming languages allow connecting the HTML to PDF API to the services written in them. Fortunately, the selection of programming languages is extensive. You can layer PDF rendering into almost any modern document management, reporting, and analytics solution.

Learn more about the software suitable for integrating HTML to PDF conversion in this article. We will list the main programming languages supported and share some useful conversion examples.

Popular Programming Languages for HTML to PDF Conversion

If you need to convert source HTML to PDF in your software, its tech stack is critical for API integration. The good news is HTML to PDF APIs like Inkit Render work with all core programming languages and technologies, including:

  • Node.js (Node JavaScript). Back-end JavaScript runtime environment used for server-side programming to create scalable and fast web servers.
  • Ruby. General-purpose programming language popular for building web applications. These may be financial, healthcare, or analytics apps that automatically generate PDF from HTML pages to provide reports.
  • PHP. Server-side scripting language used by software developers to manage databases and dynamic content. Many e-commerce websites are based on PHP.
  • Python. General-purpose programming language with great code readability that is mainly used for website development, task automation, data visualization and analysis.
  • C. Highly portable language suitable for enterprise applications, services requiring complex calculations, and operating systems.
  • C#. Multi-paradigm general programming language good for web application development and web services.
  • C++. Popular for embedded software development, medical technology, operating systems, and other complex multi-functional solutions.
  • Go. Compiled programming language preferred for lightweight microservices and web development.
  • Java. Class-based, object-oriented, and one of the most widely used programming languages. Java is often chosen for big data management and Android development.
  • JavaScript. Lightweight, compiled programming language primarily chosen for creating web pages with interactive and dynamic user experience.
  • Kotlin. The cross-platform, general-purpose language used for backend and web development, primarily for Android.
  • Objective-C. Object-oriented programming language intended for OS X and iOS mobile development.
  • OCaml. Multi-paradigm programming language initially created to design applications with symbolic computation. Now, it is popular with major software, financial, and industrial companies.
  • R. Programming language and free software environment designed for statistical computing and rarely used today.
  • Swift. General-purpose, compiled programming language suitable for iOS development, both frontend and backend. It’s particularly good for web applications.

Render also supports the cURL library and command-line tool, PowerShell task automation framework, and Clojure Lisp dialect.

Programming Languages

As you can see, HTML to PDF conversion API covers most languages currently used by software vendors. It integrates with back-end and front-end technologies, supports iOS and Android-focused programming languages, and connects with supplementary tools. Hence, it should be easy if you decide to process URL HTML to PDF through an API like Render. Just select the necessary language, complete the integration, and you are done!

Learn About User Role Setup and Management in HTML to PDF Converters

How to Customize an HTML to PDF API Code for a Specific Programming Language?

In Render’s dashboard, you can change the code of a rendering request to the necessary programming language. For example, you can customize the code for HTML to PDF PHP or HTML to PDF JavaScript conversion. It speeds up the work of software developers and allows them to use the pre-formatted code without massive changes.

To customize the code, go to Inkit’s Render dashboard and select the necessary language in the menu. The existing snippet will be automatically transferred to the chosen language. Then, you will be able to use it for PDF file generation.

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Examples of HTML to PDF PHP and HTML to PDF JavaScript Conversion

To show you how our HTML to PDF API handles different languages, we have generated code samples. They illustrate how HTML to PDF PHP, HTML to PDF JavaScript, and other programming languages are configured in Render for creating PDFs.

HTML to PDF PHP Rendering

To initiate HTML to PDF PHP rendering, you need to create a Render request in the PHP language. Once you pick the language, the code automatically changes the syntax for HTML to PDF PHP conversion. You can additionally edit some values, for example, document width and height, to customize the generated PDF.

Here’s an example of code used for HTML to PDF PHP rendering:


$curl = curl_init();

curl_setopt_array($curl, [








 CURLOPT_POSTFIELDS => "{\"html\":\"PGh0bWw+dGVzdCAgPC9odG1sPg==\",\"unit\":\"in\",\"width\":8.5,\"height\":11}",


   "Content-Type: application/json"



$response = curl_exec($curl);

$err = curl_error($curl);


if ($err) {

 echo "cURL Error #:" . $err;

} else {

 echo $response;



HTML to PDF Using JavaScript

HTML to PDF JavaScript rendering is configured similarly to HTML to PDF PHP conversion. No JavaScript library is needed. You just go to Render settings and select JavaScript as a programming language to generate the code for HTML to PDF JavaScript conversion. The HTML to PDF API enables you to additionally edit the code parameters for creating customized PDFs. For example, you can generate documents of irregular sizes, change headers and footers, add page numbers, etc.

Check out an example of code generated for HTML to PDF JavaScript rendering:

OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/json");

RequestBody body = RequestBody.create(mediaType, "{\"html\":\"PGh0bWw+dGVzdCAgPC9odG1sPg==\",\"unit\":\"in\",\"width\":8.5,\"height\":11}");

Request request = new Request.Builder()



 .addHeader("Content-Type", "application/json")


Response response = client.newCall(request).execute();

Note that the same code customization applies to other requests used in Render’s HTML to PDF converter. When you want to retrieve the generated PDF, you also select the programming language and use pre-formatted code to run the request.

Learn More About Basic Requests in HTML to PDF API

Inkit Render for HTML to PDF Documents Conversion in Multiple Languages

Render is an HTML to PDF API offered by Inkit. The PDF engine can be integrated with software solutions written in Node JS, Ruby, PHP, Python, C++, C#, C, Java, JS, and other programming languages listed in this article. After the integration, Render’s HTML to PDF API enables engineers to automate HTML to PDF conversion. They can implement programmatic report rendering in the developed tools.

Inkit Render is also unique with its user roles. You create teams and choose what level of access they have. It’s a great way to manage tasks and improve data security.

Would you like to test how Render works? Contact us to get the demo or sign up now.

Out-of-the-box PDF generation
The easiest way to automatically generate and manage paperless documents at scale.
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