Do I need to pay, register, or install anything to use Compiler Explorer?

Updated

No. Compiler Explorer (rust.godbolt.org) is a browser-based interactive compiler that you can open and use without paying, creating an account, or installing a compiler locally. The page evidence shows no pricing, subscription, or login gate — instead it offers optional support channels (Become a Patron, Sponsor on GitHub, Donate via PayPal, Compiler Explorer Shop). One real constraint: the regular site requires JavaScript; a noscript version is provided for environments without it.

What you actually need

  • A modern browser with JavaScript enabled for the full interface.
  • Nothing else. No local toolchain, no package installation, no account.
  • If JavaScript is unavailable, use the linked noscript version — the page states the regular website is not functional without JavaScript.

What is free vs. what is optional

Item Status based on page evidence
Using the compiler and viewing output Available in-browser, no payment or registration shown
Account / login No login requirement appears anywhere on the page
Local installation Not required — compilation happens on the site
Patron / GitHub sponsor / PayPal donation / shop Optional support links, not access requirements

The presence of donation and shop links does not imply that core features are paywalled; the page simply lists them alongside other site links (Wiki, Report an issue, Contact the author, Statistics, Changelog).

Practical limits to expect

  • JavaScript dependency. Without it, the main UI won't work; the noscript fallback is the documented alternative.
  • Session and sharing. The UI includes Save/Load, History, Share Short Link, Full Link, and Embed in iframe, so you can persist and share snippets without an account.
  • Execution. There is an "Execute the code" option and a Compiler Execution / Execution Only mode, meaning you can run code remotely rather than locally.

If you want to get started

  1. Open rust.godbolt.org in a JavaScript-enabled browser.
  2. Pick Rust as the language and choose a compiler from the compiler selector.
  3. Paste or type code in the Source Editor.
  4. Read the assembly in the Output pane, or switch tools (Rust MIR, Rust HIR, Rust Macro Expansion, LLVM IR, etc.) from the "Add tool" menu.
  5. Use Share Short Link or Full Link to keep or send the example.

If any step fails, the most common cause is a disabled or blocked JavaScript environment — switch to the noscript version or enable JavaScript and reload.