A premium or free HTML to PDF converter API is something many product teams need. It considerably optimizes the software development process. Instead of manual development of HTML to PDF conversion functionality, you can integrate a Create PDF API. Such a solution saves time and cuts expenses. It is applicable in financial portals, healthcare web apps, insurance websites, and any solution that generates PDFs.
Yet, to make sure the PDF generator API works as expected, you need to choose it carefully. It will be a part of your product affecting how it operates. If you make the wrong choice, the free PDF generator API will limit your capabilities and affect the end-user experience.
This article can help you pick the best Create PDF API. Learn why premium solutions might be better than free PDF generator APIs and what features to look for.
Premium vs. Free HTML to PDF Converter API
If you choose a document rendering API, you probably waver between paid and free options. Even though free HTML to PDF converter APIs will save your budget, their capabilities are insufficient for large-scale use. Such solutions are good to occasionally render several pages or test how automated document generation works. Once you reach a higher document processing volume, you need something advanced.
Paid Create PDF APIs allow product teams to convert more URL HTML files to PDFs. It gives them more flexibility and growth potential. Besides, premium solutions offer better support than free HTML to PDF converter APIs. You can contact the vendor to get help with installation, configuration, or troubleshooting.
That’s why even if you start with a free PDF generator API, we recommend choosing a solution that also supports paid plans. It will enable you to switch to a more advanced subscription once you need it.
XHTML to PDF: Everything You Need to Know
What are Standard Document Generation API Features
The functionality of paid and free HTML to PDF converter APIs varies by solution. Hence, when choosing an API for your product, research multiple options. Here we have collected the document rendering features you are likely to need.
Document Rendering Functionality
Document rendering is a basic feature. If you seek PDF automation, chances are you need to convert HTML to PDF. Raw HTML code to PDF rendering is at the core of all web products that generate custom PDFs. To create a PDF document, the API needs to put data together in HTML first.

Single Document and Batch Processing
Premium and free PDF generator APIs should process one and multiple documents with equal ease. This way, you can create a single document per user’s request or render multiple PDFs for large-scale delivery.
Customizable Formatting
To deliver multiple types of documents, you need a Create PDF API that supports customization. Make sure you can change headers and footers, layout, page size, breaks, and other parameters. Customization is essential to tailor the delivered PDFs to every recipient.
Managed User Access
User roles are crucial for data security. This feature allows you to choose who can assess document rendering functionality and generated PDFs. You can create multiple teams with different levels of access. Why does it matter? Applications with automated document rendering usually handle lots of personal data. Such docs as invoices, bills, or health reports are highly confidential. Hence, you need to take care of information security.
Template Editor with Document Templates
If the API supports document customization, a template editor is not mandatory. Still, some solutions allow editing PDF templates manually. You can change formatting, layout, fonts, and other characteristics.
Third-Party Storage Integrations
Apart from document rendering, APIs automate record-keeping and document management. Since you will need to keep the copies of created documents, the chosen API must integrate with third-party storage.
Single Sign-On
Single sign-on (SSO) enables you to log in with single credentials to any of the connected software systems. You don’t have to switch between accounts. It enhances user experience and security.