Online Go Compiler

Write, run, and share code snippets — no setup required.

main.go

Alice
30

Output

Click Run to see the output here.

package main

import (
    "bufio"
    "fmt"
    "os"
    "strconv"
)

func main() {
    scanner := bufio.NewScanner(os.Stdin)
    scanner.Scan()
    name := scanner.Text()
    scanner.Scan()
    age, _ := strconv.Atoi(scanner.Text())
    fmt.Printf("Hello, %s! You are %d years old.\n", name, age)
}

Run Go online in your browser

A free online Go (Golang) playground and compiler. Write Go in your browser, hit Run, and go build compiles and executes your program in seconds. No Go toolchain, no GOPATH, no local setup to configure first.

The editor is built on the same engine as VS Code, so Go syntax highlighting, autocompletion, and error squiggles all work. Code compiles with Go 1.24.5 and a pre-warmed standard library — fmt, net/http, encoding/json, sync, context, regexp, bufio, io, strings, strconv, time. Good for testing goroutines, building an HTTP handler, or doing a quick JSON roundtrip.

What makes this Go playground useful

Instant Go execution — write code, press Run, and see output from the online Go (Golang) compiler in seconds.
Full Go syntax highlighting, autocompletion, and clear compile errors, powered by the same editor engine as VS Code.
Stdin input is supported. fmt.Scan, fmt.Scanln, and bufio.NewScanner(os.Stdin) all read from the playground's input box, so command-line-style Go programs work end-to-end. No GOPATH or go install on your end.
Go 1.24.5 with the standard library pre-warmed — fmt, net/http, encoding/json, sync, context, regexp and more compile instantly.

What you can build in the Go (Golang) playground

Goroutines, channels, and struct methods: the idiomatic Go concurrency model, compiled with go build.
HTTP handlers with net/http, JSON encoding/decoding with encoding/json, and concurrent workers with sync.
Quick experiments: try a new stdlib package, benchmark two approaches, or verify a goroutine leak fix.

Online Go (Golang) playground FAQ

Is the online Go (Golang) playground free?

Yes, the Go (Golang) playground is free to use. No sign-up, no install, and no Go toolchain to set up — open the page and run.

Do I need Go installed to use the online compiler?

No install needed. You don't need Go or go install on your machine. The online Go compiler (go build) runs your code and returns the output in seconds.

Does the Go playground work on mobile and Chromebooks?

Yes. The Go playground runs in any modern browser, on desktop, tablet or mobile. Good for running Go online from a Chromebook or any machine without a local toolchain.

Does the Go playground support fmt.Scan and stdin?

Yes. fmt.Scan, fmt.Scanln, and bufio.NewScanner(os.Stdin) all read your typed lines the same way they would when you run go run main.go locally and type at the terminal. Useful for CLI-style programs and interview problems.

How do I learn Go after trying the playground?

Edit the sample Go code, press Run, and iterate. When you want something more structured, Coddy's interactive Go course takes you from goroutines and channels to concurrency patterns.