Development — entry 095 of 100

Wandbox

Verified Jul 2026

Wandbox is a free "social compilation service" built by melpon and kikairoya, offering 175 compiler configurations across 35 languages — from mainstream C++, Python, Rust, and Go to niche picks like Lazy K and Pony — including nightly HEAD builds of GCC and Clang. Its REST API needs no key: POST source code, a compiler ID, and options to /api/compile.json (or the /ndjson variant for streamed output) and get back compile/runtime output plus a permanent shareable permalink, while /api/list.json enumerates every compiler and its supported switches. The project was rewritten in 2024–2026 from a legacy Ruby backend to Rust (feline) and Remix (canine), which is why the old kennel2/API.rst docs path 404s — the live API endpoints themselves are unchanged.

online-compilercode-executionsandboxdeveloper-toolsopen-source
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSON, NDJSONResponses can be requested as JSON or NDJSON.

GreatAPIs Score

Score94out of 100
Authentication25/25No authentication required
Pricing20/20Free to use
Docs14/20Documentation URL provided
Formats15/15Supports 2 response formats
Freshness20/20Verified within 6 months

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Scored 94 on greatapis.com
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Auth quickstart

  1. No key needed — call it now.
Stored keyNo key stored

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