Is this the official Go compiler?

No. It is Yaegi, a Go interpreter. Most programs behave the same, but a few advanced features, such as cgo, some reflection or generics edge cases and goroutine timing, may differ.

Type values in the input box. fmt.Scan, or a bufio.Scanner reading os.Stdin, reads them in order.

Is my code uploaded to a server?

No. Your code runs entirely in your browser. Only the Go runtime is downloaded from a public CDN (jsDelivr) on first use.

Online Go Compiler

Run Go code online in your browser. Standard packages like fmt, strings and sort, stdin input and instant output. Free, no sign-up, nothing uploaded.

Go

Ctrl/⌘ + Enter to run

main.go

No output yet. Press Run to see results here.

Code runs locally in your browser; it is not uploaded.

Format references

Go — Language specification
Yaegi — Go interpreter

Tool page updated: 2026-10-22

Go

Guide and example

Related tools

Format references