“Java”

Online editor and runner for PHP, Java, Ruby, Python, Swift and other languages.

Block and JavaScript editor for building retro games that run in the browser or on handheld hardware.

Packs the string literals of a JavaScript module into an XOR-encoded table without eval, for Cloudflare Workers.

Tests regexes for Python, PHP, Ruby, JavaScript, Java and MySQL with a visual explainer.

Search Java libraries and artifacts on Maven Central.

Executes ES5-style JavaScript in a small WebAssembly engine and keeps the code in the page address.

Runs JavaScript inside a QuickJS WebAssembly sandbox with a synchronous fetch helper and example snippets.

Block and JavaScript editor with a simulator for the Adafruit Circuit Playground Express.

Zero-cost MCP server for local code inspection and best-practice recommendations

Audit, reschedule and author Microsoft Project schedules.

Auditable, conserved AST code intelligence for AI agents.