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Online Go Compiler

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

main.go
Output
Click Run to see the output here.

Run Go online in your browser

This is a free online Go (Golang) playground and compiler. Write Go code directly in your browser, hit Run, and watch go build compile and execute in seconds — no Go toolchain, no GOPATH, no local setup required. It's the fastest way to test a stdlib package, try a concurrency pattern, or explore a new Go idea.

Under the hood, the editor uses the same engine as VS Code (Go syntax highlighting, autocompletion, error squiggles), and your 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). Whether you're trying goroutines, building an HTTP handler, or testing a quick JSON roundtrip, this online Go compiler goes from idea to output in seconds.

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 — the same editor engine that powers VS Code.
  • Stdin input 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 toolchain install — no GOPATH, no go install.
  • 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 completely free — no sign-up, no install, 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 on any modern browser — desktop, tablet, or mobile. Great for running Go online from a Chromebook or any machine without a local toolchain.
Does the Go playground support fmt.Scan and stdin?
Yes. The playground has a stdin input box — 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 structured practice, Coddy's interactive Go course takes you from goroutines and channels to concurrency patterns.