By Devcipator | No-Code and Low-Code Development Agency
One of the most common requirements in production Bubble.io apps is the ability to generate PDF documents automatically. Whether you need to produce invoices for a SaaS billing system, receipts for a marketplace, certificates for an education platform, or reports for an internal tool, automated PDF generation saves time and makes your app feel polished and professional.
In this tutorial, we walk you through the complete process of connecting PDFGeneratorAPI to your Bubble.io app using the API Connector. By the end, your app will be able to generate dynamic PDF documents on demand, complete with real data from your Bubble database, and produce a download URL that can be shared, emailed, or stored.
Watch the full video tutorial here: https://youtu.be/7j4ZS400Tpw
Why Use PDFGeneratorAPI With Bubble.io?
There are several ways to generate PDFs inside Bubble.io, but PDFGeneratorAPI stands out for a few important reasons.
It allows you to design your PDF templates visually using a dedicated template editor, then fill them dynamically with data from your Bubble app through a simple API call. The output is a clean, professionally formatted PDF document that can be downloaded, emailed to users, or stored as a file URL in your database.
It works entirely through the API Connector, meaning no additional plugins are required and the integration fits naturally into any existing Bubble workflow.
Who Is This Tutorial For?
This tutorial is ideal for:
Bubble.io developers building SaaS apps that need invoice or receipt generation Teams building marketplaces or e-commerce platforms that require order documents Anyone building internal tools that produce reports or data exports as PDFs No-code builders who want to add professional document automation to their Bubble app
No prior API experience is required. Every step is explained clearly from the beginning.
Tools Used in This Tutorial
Bubble.io Bubble.io API Connector PDFGeneratorAPI
Step 1: Setting Up PDFGeneratorAPI
Go to pdfgeneratorapi.com and create an account. PDFGeneratorAPI offers a free trial that is sufficient for development and testing.
Once inside your dashboard, navigate to your workspace settings and copy your API key and secret. You will need these to authenticate your API calls from Bubble.io.
Also take note of your workspace identifier, as this is required as part of the API endpoint URL when making requests.
Step 2: Creating or Loading a PDF Template
PDFGeneratorAPI includes a visual template editor where you can design your PDF layout before connecting it to Bubble. This is where you define the structure of your document, including headers, tables, text fields, logos, and any other design elements.
Inside the template editor, you can add dynamic placeholders for the data you want to fill in from Bubble. These placeholders follow a simple syntax and correspond to the field names you will send in your API request body.
For example, if you want to display a customer name on the PDF, you add a placeholder like customer_name in the template. When you send the API request from Bubble, you pass the actual customer name as the value for that field.
Once your template is ready, copy the template ID from the PDFGeneratorAPI dashboard. You will use this in your API Connector setup inside Bubble.
Step 3: Setting Up the API Connector in Bubble.io
Open your Bubble.io app and go to the Plugins tab. Install the API Connector plugin if you have not already done so.
Create a new API inside the API Connector and name it PDFGeneratorAPI. Set the authentication type to use your API key and secret as required by PDFGeneratorAPI. Refer to the PDFGeneratorAPI documentation for the exact authentication header format required for your account.
Create a new API call inside this connector for the PDF generation endpoint. Set the method to POST and enter the correct endpoint URL including your workspace identifier and template ID.
In the request body, define the dynamic fields that correspond to the placeholders in your PDF template. These fields will be populated with real data from your Bubble workflows when the API call is triggered.
Step 4: Sending Dynamic Data From Bubble
Once your API call is configured and initialized inside the API Connector, you can trigger it from any Bubble workflow and pass in dynamic data from your database.
For example, if you are generating an invoice, your workflow might pull the customer name, order items, total amount, and invoice date from your database and pass each of these values into the corresponding fields in your API call.
This is done inside a workflow action using the API call you set up, with each parameter mapped to a dynamic value from your Bubble data source.
Step 5: Generating the PDF Output URL
When the API call is successful, PDFGeneratorAPI returns a response that includes the URL of the generated PDF document. This URL points to the finished PDF file hosted on PDFGeneratorAPI’s servers.
Inside your Bubble workflow, you can use this URL to:
Display a download link directly on the page for the user to access Send the PDF URL in an automated email to the user Save the URL to your Bubble database for future reference or access Pass it to another workflow for further processing
This flexibility makes it easy to integrate PDF generation into almost any app flow, whether it is triggered by a user action, a scheduled workflow, or an API webhook.
Fixing Common Errors
A few errors come up regularly when setting up PDFGeneratorAPI with Bubble.io. Here is how to handle the most common ones.
401 Unauthorized: This means your API key or secret is incorrect, or the authentication headers are not formatted correctly. Double check your credentials in the PDFGeneratorAPI dashboard and make sure they are entered exactly as required in the API Connector.
402 Payment Required: This error indicates that your PDFGeneratorAPI account has exceeded the limits of your current plan or trial. Upgrade your plan or check your usage limits in the dashboard.
Data mapping issues: If your PDF is generating but fields are blank or showing placeholder text instead of real data, the field names in your API request body do not match the placeholder names in your PDF template. Make sure the field names match exactly, including capitalization and spacing.
Best Practices for PDF Generation in Bubble
Always initialize your API call with sample data before using it in a live workflow. This ensures the field mapping is correct and the PDF output looks as expected before real user data is involved.
Store the generated PDF URL in your Bubble database whenever possible. This gives users the ability to access previously generated documents without triggering a new API call each time.
For high-volume apps, consider triggering PDF generation through a backend workflow rather than a client-side workflow. This is more reliable and prevents issues caused by users closing their browser before the workflow completes.
Watch the Full Video Tutorial
Every step covered in this guide is demonstrated in full detail in our YouTube tutorial:
How to Generate PDF in Bubble.io Using PDFGeneratorAPI | Full API Tutorial
Watch it here: https://youtu.be/7j4ZS400Tpw
Frequently Asked Questions
Do I need coding experience to follow this tutorial? No. Everything in this tutorial is done inside Bubble.io using the API Connector plugin. No coding is required at any point.
Is PDFGeneratorAPI free to use? PDFGeneratorAPI offers a free trial that is suitable for development and testing. Paid plans are available for production apps with higher document generation volumes.
Can I use my own custom PDF template design? Yes. PDFGeneratorAPI includes a visual template editor where you can design your PDF layout from scratch, including custom branding, logos, tables, and dynamic placeholders.
Can I email the generated PDF to users automatically? Yes. The API returns a PDF URL after generation, which you can pass into a Bubble email workflow to send the document to your users automatically.
What types of documents can I generate with this integration? You can generate any type of document including invoices, receipts, certificates, reports, contracts, order confirmations, and any other structured document your app requires.
What should I do if my PDF fields are showing blank or placeholder text? This is a data mapping issue. Check that the field names in your API request body exactly match the placeholder names in your PDFGeneratorAPI template, including capitalization and spacing.