Convert Image to PDF using ConvertAPI

This n8n workflow demonstrates how to convert an image file to a PDF document using an external API. It provides a foundational structure for integrating image processing services into your automated workflows.

What it does

This workflow performs the following steps:

1. Triggers Manually: The workflow starts when manually executed within n8n.
2. Reads a File: It reads a file from disk, which is intended to be the image you want to convert.
3. Sends HTTP Request: It makes an HTTP POST request to an external API (presumably ConvertAPI, based on the directory name) to perform the image-to-PDF conversion. The specific API endpoint and payload would need to be configured within the HTTP Request node.

Prerequisites/Requirements

• n8n Instance: A running instance of n8n.
• Image File: An image file on the local disk where n8n is running, accessible by the "Read/Write Files from Disk" node.
• ConvertAPI Account (or similar image conversion API): An account with ConvertAPI or another service that provides an API for image-to-PDF conversion. You will need:
  • API Endpoint URL
  • API Key or authentication details
  • Knowledge of the required request body/parameters for the conversion.

Setup/Usage

1. Import the Workflow: Import the provided JSON into your n8n instance.
2. Configure "Read/Write Files from Disk" Node:
   • Specify the Operation as Read.
   • Set the File Path to the absolute path of the image file you want to convert on your n8n server's disk.
3. Configure "HTTP Request" Node:
   • Method: Set to POST.
   • URL: Enter the API endpoint for your chosen image-to-PDF conversion service (e.g., https://v2.convertapi.com/convert/jpg/to/pdf?Secret=<YOUR_CONVERTAPI_SECRET>).
   • Headers: Add any necessary authentication headers (e.g., Authorization: Bearer <YOUR_API_KEY>).
   • Body Parameters:
     • Set Body Content Type to Multipart/form-data.
     • Add a parameter for the file. The exact key will depend on the API, but commonly it's file or document.
     • Set the Value for the file parameter to an expression that references the binary data from the previous node, e.g., ={{ $('Read/Write Files from Disk').item.binary.data }}.
     • You might also need to send other parameters like filename, output format, etc., depending on the API.
4. Execute the Workflow: Click the "Execute Workflow" button in the "When clicking ‘Execute workflow’" node to run the workflow.

The output of the "HTTP Request" node will contain the response from the conversion API, which should include the converted PDF file in binary format. You can then add further nodes to save this PDF to disk, upload it to a cloud service, or send it via email.