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Go Online Compiler

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How to run and test Go code online

  1. 1

    Enter or paste Go code

    Write Go code with a func main in the editor, or pick a preset example to start quickly. This online runner is great for snippet tests, debugging and learning demos.

  2. 2

    Split across multiple files

    One main package can be split into multiple .go files — clicking Run executes the whole project. You can also upload files or import a ZIP.

  3. 3

    Run and inspect output

    Click Run and the code executes immediately through the local Go WASM runtime. The right panel shows standard output and errors separately; an inline input box appears when the program waits for input.

  4. 4

    Share or reuse snippets

    Copy the output, restore history, or generate a shareable link so others can open and re-run the exact same Go code.

Descripción general de características

Run Go code directly in the browser, experiment with goroutines and channels, and test snippets. Executed locally via WebAssembly — no server, no local toolchain, code stays on your device.

Descripción de la herramienta

Free Go online compiler and playground that runs Go code in the browser. Supports goroutine demos, same-package multi-file projects, file upload and interactive input, with popular third-party packages bundled — code and data never leave your device.

Última actualización

Lista de capacidades

  • Run Go code locally in your browser on a Go WASM runtime — no uploads.
  • Experiment with goroutines, channels and select to learn Go concurrency hands-on.
  • The standard library works out of the box: fmt, strings, strconv, sort, time, encoding/json, errors and more.
  • Curated third-party packages are bundled (uuid, yaml.v3, errgroup, decimal) — import and go.
  • Split a main package across multiple source files and run the project as a whole, with file upload and ZIP import.
  • Interactive console input: standard idioms like bufio.Scanner(os.Stdin) read line by line.
  • Stop infinite loops instantly and get back to a runnable state.
  • Run history is stored locally — restore, re-run and compare snippets anytime.
  • Generate shareable links so colleagues can reproduce the exact same Go code.

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Preguntas frecuentes

Is this a Go online compiler or a Go code runner?
Most people searching for a Go online compiler actually want a Go code runner that executes code immediately and shows the result clearly. This tool interprets and runs Go in the browser with streaming output, focusing on snippet runs and debugging rather than full project builds.
Does the code run on a server?
No. The runtime is compiled to WebAssembly and executes in your browser. In normal usage your code is never uploaded to a remote server, which makes it suitable for private snippet testing.
Which Go version does this tool support?
The runtime is built against the Go 1.22 standard library and supports language features through Go 1.21, including most commonly used generics syntax. A few brand-new syntax features may be unsupported — try an equivalent classic form if you hit an error.
Which third-party packages are supported?
Bundled packages are github.com/google/uuid, gopkg.in/yaml.v3, golang.org/x/sync/errgroup and github.com/shopspring/decimal — just import them. Other third-party packages are not supported; the standard library needs no setup at all.
Which Go code suits this tool?
Great for testing syntax, goroutines and channels, interfaces, error handling, slices and maps, JSON encoding, string handling and the time package. Full server scenarios that need CGO, local filesystem writes, network listeners (like http.ListenAndServe) or databases are out of scope.
Which standard libraries can I run?
Commonly used packages such as fmt, strings, strconv, sort, time, math, errors, encoding/json, sync, bufio, io can all be imported and used directly.
Is there a time limit for Go code runs?
There is no forced timeout. Long-running code keeps running until you press Stop, which terminates it immediately; you can run again right away.
How does console input work?
When your code reads os.Stdin via bufio.NewScanner or fmt.Scan, an inline input box appears at the end of the output stream. Submit lines one by one and press the EOF button to end input, which the program sees as end-of-file.