UmpleOnline: Generate Java, C++, PHP, Alloy, NuSMV or Ruby code from Umple

Draw on the right, write (Umple) model code on the left. Analyse models and generate code.
Sept 11 2026. Collaboration currently not working. Important improvements underway. More news shortly.
This tool stores your data in cookies and on a server. For the AI feature, your API key is never sent to our server backend. I understand. Click to learn about privacy.
Download Donate For help: User manual Ask questions Report issue

JavaScript is disabled so the dynamic features of this page will not work. To use UmpleOnline, turn Javascript on. Otherwise you can download the command-line Umple compiler or use Eclipse. // In this example, we have made the address // optional. Now, it does not appear on the // constructor. However when you add an address it // still cannot be null. // // Note also that in this example, the role name // 'address' is left off to show it is optional. class Person { name; * -> 0..1 Address; } class Address { street; city; postalCode; country; }//$?[End_of_model]$? class Person { position 49 29 113 63; position.association Address__Person 30,63 30,0; } class Address { position 49 131 149 114; }