Online Blockly Compiler
Write Blockly in the browser and run it on our machines. The editor is opening.
Free online Blockly 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 Blockly and many other languages, without installing a toolchain.
What you see on this page is JDoodle’s free Blockly compiler. Write Blockly in the editor, press Execute, and JDoodle runs it on its servers. You do not install Blockly, and you do not need a JDoodle account to run code.
Online Blockly editor
JDoodle’s Blockly editor on this page highlights syntax, completes as you type, matches brackets, and folds blocks. It is an online Blockly editor and a compiler together: you write here, then Execute runs your program on JDoodle’s servers.
Blockly versions on JDoodle
JDoodle currently ships these Blockly builds. Choose one from the version menu before you execute. The installed releases are Dart, Lua, PHP, and Python.
| Version |
|---|
| Dart |
| Lua |
| PHP |
| Python |
Frequently asked questions
Is JDoodle’s online Blockly compiler free?
Yes. JDoodle lets you write and run Blockly without paying. A JDoodle account is only needed to save projects, use more AI credits, or unlock faster workspaces.
Do I need to install Blockly to use JDoodle?
No. JDoodle runs Blockly on its servers. Open this page in a browser and execute.
Which Blockly 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 Dart, Lua, PHP, and Python.
Is this an online Blockly editor or a compiler?
Both. The page is an online Blockly editor and it compiles and runs what you write.
Input, interactive runs, files, and the rest of the editor work the same on every language. See the JDoodle IDE documentation.