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HTML to PDF API Tutorial: Generating Invoices and Receipts with PDFLayer and VATLayer APIs

Creating Custom Invoices: A Step-by-Step Guide Using PDFLayer and VATLayer APIs

In the digital age, businesses of all sizes must manage financial records such as invoices and receipts efficiently. This detailed article presents a simplified way to create bespoke invoices with APILayer’s strong PDFLayer and VATLayer APIs. This guide will lead you through the processes to automate invoice production, assuring accuracy, personalization, and compliance, whether you’re a seasoned developer or new to API connectivity.

Purpose and Benefits

Manually creating invoices may be time-consuming and error-prone. Using APILayer’s PDFLayer and VATLayer APIs to automate this procedure has various advantages:

  • Increase efficiency by using automated technologies to speed up the invoice creation process.
  • Ensure accuracy in VAT computations and compliance with tax legislation.
  • Personalization: Customise invoices to fit your brand identity and unique business requirements.

Features and Advantages

  • HTML to PDF Conversion: The PDFLayer API makes it simple to turn HTML layouts into clean, professional PDF invoices.
  • VAT Calculation:The VATLayer API streamlines the process of assessing and computing VAT rates, assuring financial transaction correctness.
  • Customization Options: Both APIs include considerable customization possibilities, allowing you to adapt the output to your specific business needs.

Getting Started

  • Sign Up: To begin, register for the PDFLayer and VATLayer APIs at APILayer.com to obtain your individual API keys.
  • Setup Your Environment: Python is the programming language of choice for this session. Ascertain that you have a Python environment ready for coding.
Getting Started

Creating an HTML Invoice Template

Designing the Template

Your HTML template should include:

  • Invoice Number
  • Date
  • Customer Information
  • Itemised Products or Services
  • Prices, Subtotal, VAT Rate, and Total

Crafting the HTML

To organize your invoice, use basic HTML components. For example:

Responsive Design Tips

  • For a responsive layout, use CSS frameworks such as Bootstrap.
  • To verify compatibility, test your template on a variety of devices.

This template can be customized further to meet specific branding or formatting needs. Its simple structure and layout make it an adaptable starting point for creating professional bills.

You can save this as an HTML file for further use.

Applying VAT

VAT Calculation with VATLayer API

To apply the right VAT rate, use the VATLayer API. Here’s a simple Python script for calculating VAT:

This script shows how to include the VATLayer API for VAT computations into your Python application.

Converting HTML to PDF

Utilising PDFLayer API

Use the PDFLayer API to convert the HTML invoice to a PDF. Here’s how to accomplish it in Python:

This example demonstrates how to send HTML content to the PDFLayer API and receive a PDF file back, and it is the main part of the application:

Here is the application in action:


You can find the complete project source code from this GitHub repository. Moreover, check our latest articles where you can learn how to automate various business tasks using our powerful API services:

Advanced Customization with PDFLayer and VATLayer APIs

The ability to integrate the paperwork with your corporate identity, generating a consistent and memorable client experience, is an important component of professional invoicing. The PDFLayer and VATLayer APIs from APILayer provide comprehensive customization possibilities that go beyond simple template design, allowing businesses to completely incorporate their brand into every invoice.

You may add unique branding components to your invoices using the PDFLayer API. This includes adding your company’s logo, employing bespoke fonts that match your brand’s typography, and using your brand’s color palette throughout the page. Such personalization guarantees that your invoices are more than just transactional records, but also show your brand’s competence and devotion to detail.

These APIs offer possibilities for customizing the style and structure of your invoices in addition to visual features. You may display itemized facts, client information, and remarks in a clear and consistent manner with your brand’s messaging. The APIs adapt to a broad range of design choices, whether it’s a minimalist design for a clean, modern look or a more thorough layout for a full information presentation.

Businesses may use these extensive customization tools to generate invoices that are not only functional but also improve brand awareness and client confidence. This degree of customizing, which was previously reserved for complicated and expensive software solutions, is now easily available via the PDFLayer and VATLayer APIs’ straightforward and versatile interfaces.


Creating bespoke, legal, and professional-looking bills becomes a quick and error-free procedure with the combination of the PDFLayer and VATLayer APIs. These tools not only save time but also provide precision and personalization that human methods cannot match. Adopting these technologies can dramatically improve your company’s operational efficiency and financial accuracy.

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