Online Ruby Compiler
Write Ruby in the browser and run it on our machines. The editor is opening.
Free online Ruby compiler and editor
JDoodle is an online IDE that has served the programming community since 2013. You write, compile, and run code in the browser for Ruby and many other languages, without installing a toolchain.
What you see on this page is JDoodle’s free Ruby compiler. Write Ruby in the editor, press Execute, and JDoodle runs it on its servers. You do not install Ruby, and you do not need a JDoodle account to run code.
Online Ruby editor
JDoodle’s Ruby editor on this page highlights syntax, completes as you type, matches brackets, and folds blocks. It is an online Ruby editor and a compiler together: you write here, then Execute runs your program on JDoodle’s servers.
Ruby versions on JDoodle
JDoodle currently ships these Ruby builds. Choose one from the version menu before you execute. The installed releases are 2.2.4, 2.4.2p198, 2.5.1p57, 2.6.5, 3.0.2, 3.0.6, and 3.4.8.
| Version |
|---|
| 2.2.4 |
| 2.4.2p198 |
| 2.5.1p57 |
| 2.6.5 |
| 3.0.2 |
| 3.0.6 |
| 3.4.8 |
Libraries
JDoodle can pull public packages into a Ruby run. Add them in the library field, for example faker:2.18.0. Private or local packages are not available on this JDoodle page.
Debugging Ruby online
JDoodle debugs Ruby in the browser, so you do not have to read a program and guess what it did. Set a breakpoint by clicking a line number, press Debug, and execution stops there. From that point you can step over a line, step into a call, step back out, or let it run on to the next breakpoint, and the call stack beside the editor shows how you arrived. Every local variable in the frame you are looking at is listed with its current value, and objects and arrays open up so you can look inside them. A debug session is interactive, so a program that reads input still reads it from you while it is paused.
Debugging runs on 3.4.8, the newest Ruby build here and the one this page opens with. Older versions still compile and run as they always did, and the Debugger tab says so if you switch to one.
Debugging is free to use. Sessions last three minutes on the free plan and ten minutes on Pro and Teacher plans, and you can start as many as you need.
Frequently asked questions
Is JDoodle’s online Ruby compiler free?
Yes. JDoodle lets you write and run Ruby without paying. A JDoodle account is only needed to save projects, use more AI credits, or unlock faster workspaces.
Do I need to install Ruby to use JDoodle?
No. JDoodle runs Ruby on its servers. Open this page in a browser and execute.
Which Ruby version should I pick on JDoodle?
Choose the version that matches the course or codebase you are working against from the version menu. The builds JDoodle has installed are 2.2.4, 2.4.2p198, 2.5.1p57, 2.6.5, 3.0.2, 3.0.6, and 3.4.8.
Can I add Libraries on JDoodle?
Yes, if the package is public. Private or local packages are not supported on this JDoodle page.
Can I run a multi-file Ruby project online?
Not on this page, which runs a single Ruby file. For several files in one project, open the JDoodle Ruby IDE. Everything else works the same on both.
Is this an online Ruby editor or a compiler?
Both. The page is an online Ruby editor and it compiles and runs what you write.
Can I debug Ruby code online?
Yes. JDoodle has a step debugger for Ruby. Click a line number to set a breakpoint, press Debug, and the program stops there so you can step over, step into, and read the call stack. Local variables are listed with their values while you are paused, and you can open objects and arrays to look inside. Debugging runs on 3.4.8, the newest build here and the one this page opens with. Debugging is free, and a session runs for three minutes on the free plan or ten on a paid one.
Input, interactive runs, files, and the rest of the editor work the same on every language. See the JDoodle IDE documentation.