How to Generate PDF Files in Go

Go has no built-in PDF generation; you must use a third-party library like unidoc or go-pdf.

package main

import (
	"log"
	"os"

	"github.com/unidoc/unipdf/v3/creator"
)

func main() {
	c := creator.New()
	c.AddPage()
	c.AddText("Hello, PDF!", 100, 100)

	outFile, err := os.Create("output.pdf")
	if err != nil {
		log.Fatal(err)
	}
	defer outFile.Close()

	if err := c.Write(outFile); err != nil {
		log.Fatal(err)
	}
}

Go cannot create PDF files on its own because it lacks a built-in library for that specific format. You need to install an external tool from the community that handles the complex math and formatting required to build a PDF. Think of it like needing a specific printer driver to print a document; the computer knows how to write text, but it needs that extra driver to format it for the printer.