Languages

29 languages, each with a pinned toolchain. Execute picks one by the active file's extension.

Language	Version	Extension	Default entry	Time limit	Memory	Server
Python	3.13	`.py`	`main.py`	10 s	256 MB	pyright
JavaScript (Node.js)	24	`.js`	`main.js`	10 s	256 MB	–
TypeScript (Node.js)	24	`.ts`	`main.ts`	10 s	256 MB	–
Rust	1.95	`.rs`	`main.rs`	10 s	256 MB	rust-analyzer
C	GCC 15 (C17)	`.c`	`main.c`	10 s	256 MB	clangd
C++	GCC 15 (C++20)	`.cpp`	`main.cpp`	10 s	256 MB	clangd
Java	21	`.java`	`Main.java`	20 s	512 MB	–
Kotlin	2.4 (JVM 21)	`.kt`	`main.kt`	20 s	512 MB	kotlin-language-server
Go	1.25	`.go`	`main.go`	10 s	256 MB	gopls
PHP	8.4	`.php`	`main.php`	10 s	256 MB	–
Bash	5.2	`.sh`	`main.sh`	10 s	256 MB	bash-language-server
Ruby	3.4	`.rb`	`main.rb`	10 s	256 MB	–
Perl	5.40	`.pl`	`main.pl`	10 s	256 MB	–
Lua	5.4	`.lua`	`main.lua`	10 s	256 MB	–
Haskell	GHC 9.6	`.hs`	`main.hs`	10 s	256 MB	–
Swift	6.0	`.swift`	`main.swift`	10 s	256 MB	–
Dart	3.6	`.dart`	`main.dart`	20 s	512 MB	–
Julia	1.11	`.jl`	`main.jl`	20 s	512 MB	–
Elixir	1.18	`.exs`	`main.exs`	20 s	512 MB	–
Erlang	OTP 27	`.erl`	`main.erl`	20 s	512 MB	–
R	4.4	`.r`	`main.r`	20 s	512 MB	–
Nim	2.2	`.nim`	`main.nim`	10 s	256 MB	–
Crystal	1.14	`.cr`	`main.cr`	10 s	256 MB	–
OCaml	5.2	`.ml`	`main.ml`	10 s	256 MB	–
Zig	0.17	`.zig`	`main.zig`	10 s	256 MB	–
Smalltalk (GNU)	3.2	`.st`	`main.st`	10 s	256 MB	–
SQL (PostgreSQL)	18	`.sql`	`main.sql`	40 s	768 MB	–
SQL (MySQL)	8.4	`.sql`	`main.sql`	40 s	768 MB	–
MongoDB (mongosh)	8.0	`.js`	`main.js`	40 s	768 MB	–

SQL languages run a throwaway database server per execution and ignore stdin: the file is the whole program. Their output pane shows each result set as a table and, above it, the tables (or MongoDB collections) the run left behind with row counts and columns; Show raw output switches to the plain text. MongoDB and some others run only on the Docker backend; the footer says "toolchain unavailable" where a host lacks one.