Code Runner

Pick a language, type, press Run. What the program prints lands in the console; what it draws, a plot, a canvas, an SVG, a whole page, lands in the pane beside it. Every language is an open source interpreter or compiler somebody has already ported to the browser; this page fetches the one you choose from this site, once, and runs your code on your machine. Nothing is sent anywhere.

Nothing has run yet

Language Language Example

Input, arguments and the time limit

Input, read by the program as standard input

Arguments Time limit, seconds

Projects

Projects are kept in this browser. A zip holds every file, the Input and the arguments; inside SayerOS an export goes to Files.

Console

Time0 ms

Heapn/a

Output0 B

Exitnone

Libraries and standard libraries

Ctrl+Enter runs. Ctrl+. stops. Ctrl+S saves the project. Alt+Right and Alt+Left move between files, Alt+N adds one. Escape hides the pane. Tab indents, Shift+Tab outdents.