Add Images to Pdf

This guide explains how to add multiple images to a pdf document one image per page.

Before you begin

You should get your API key from your UniCloud account.

If this is your first time using UniPDF SDK, follow this guide to set up a local development environment.

Project setup

Clone the project repository

In your terminal, clone examples repository. It contains the Go code we will be using for this guide.

git clone

Navigate to the image folder in the unipdf-examples directory.

cd unipdf-examples/image

Configure environment variables

Replace the UNIDOC_LICENSE_API_KEY with your API credentials from your UniCloud account.





How it works

In lines 9-25 the import section and the init function imports the necessary libraries and authenticates the request.using UNIDOC_LICENSE_API_KEY respectively.

The main function in lines 27-43 reads the environment variables and calls imagesToPdf to add the list of images to the pdf pages.

The imagesToPdf function defines in lines 46-70 adds the images to the pdf file provided in the parameter. The loop in lines 49-66 iterates through each image, creates a new page, and draws the image on the page. Finally the document is written to output file using c.WriteToFile(outputPath) in line 68.

Run the code

go run pdf_images_to_pdf.go output.pdf img1.jpg img2.jpg img3.png ...

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