Loper · Developers

Open .go files on your Mac.

.go

Go source and tools: packages, functions, types and strings at a glance.

Loper is a free, minimal editor for macOS that opens Go instantly and colors every part of the file, so you find the value you need at a glance and can fix it right there. No IDE, no project to load, no gray wall of text.

main.go opened in Loper: Go with color-coded Go
Show the file as text
package main import (	"fmt"	"net/http"	"time") func health(w http.ResponseWriter, r *http.Request) {	fmt.Fprintf(w, "ok %s\n", time.Now().Format(time.RFC3339))} func main() {	http.HandleFunc("/health", health)	http.ListenAndServe(":8080", nil)}

How to open .go files

  1. Download Loper (free, Apple silicon, signed and notarized) and move it to Applications.
  2. Double-click your .go file, drag it onto the Loper window, or right-click it and choose Open With › Loper.
  3. Want every .go file to open in Loper? Choose Loper › Make Loper the Default Editor….