How to Use embed.FS for Embedded File Systems

Use the embed.FS type to declare a variable that embeds a directory of files at compile time, making them accessible via the io/fs interface.

package main

import (
	"embed"
	"fmt"
	"io/fs"
)

//go:embed assets/*
var Content embed.FS

func main() {
	files, _ := fs.Glob(Content, "assets/*.txt")
	fmt.Println(files)
}

The //go:embed directive must precede the variable declaration and specify the path pattern relative to the source file.

embed.FS lets you pack files like images or templates directly into your Go program's binary. Instead of needing to copy files to a server or disk, the program carries everything it needs inside itself. Think of it like zipping your files into the executable so they travel with it wherever it goes.