What is Wandbox?

Updated

Wandbox is a browser-based code compilation and execution service. You paste or type source code, pick a language, and run it on a remote server without installing a compiler or interpreter locally. It fits quick experiments, sharing a minimal reproducible snippet, or checking how a different language version behaves — not long-running programs or anything needing persistent storage.

What you can do with it

  • Compile and run code in the browser. The editor accepts source code, and the service executes it server-side and returns output.
  • Switch between many languages. The language list includes Bash script, C, C#, C++, Crystal, D, Elixir, Erlang, Go, Groovy, Haskell, Java, JavaScript, Julia, Lazy K, Lisp, Lua, Nim, OCaml, OpenSSL, PHP, Pascal, Perl, Pony, Python, R, Ruby, Rust, SQL, Scala, Swift, TypeScript, Vim script, and Zig.
  • Provide standard input. A Stdin option lets you feed input to programs that read from standard input, so interactive-style or input-driven snippets can be tested.
  • Toggle LSP. You can enable or disable LSP (Language Server Protocol) support, which affects editor features like diagnostics and completion.
  • Sign in with GitHub. A GitHub login option is available, alongside a settings/log area.

When it is a good fit

Situation Wandbox works well Wandbox is a poor fit
Trying a language you have not installed Yes — pick it from the list and run —
Sharing a small snippet with someone Yes — no local setup needed on either side —
Programs that read from stdin Yes — use the Stdin field —
Long-running or resource-heavy jobs — No; it is a shared online runner
Storing files between sessions — No persistent project workspace is described
Needing a specific library you installed — Only what the remote environment provides

Practical notes

  • Language versions matter. The exact compiler/interpreter version behind each language entry is not listed in the available page information, so verify behavior against your target version if that is critical.
  • Input handling. If your program appears to hang or produce no output, check whether it is waiting on stdin and whether you filled the Stdin field.
  • Editor behavior. If completion or diagnostics seem missing, check the LSP setting — it can be enabled or disabled.
  • Account. GitHub login is offered; the page information does not state what signing in changes, so treat it as optional unless you need whatever account features it unlocks.

Getting started

  1. Open wandbox.org.
  2. Select your language from the language list.
  3. Enter your code in the editor.
  4. If the program reads input, put it in the Stdin field.
  5. Run it and read the output.
  6. Adjust the LSP setting if you want editor assistance on or off.