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DIVAKAR BABU 15DIVAKAR BABU 15 

How many controller extensions can we have per Visual Force page?

NagendraNagendra (Salesforce Developers) 
Hi Divakar,

Currently, there is no limit on the number of extensions you can have on a VF Controller. Of course, having too much of them would also affect the readability and maintainability of the code.

Note: You can use one extension attribute and You can mention many classes with comma separated.

For more information may I suggest you please check with below link from the community forums which might help you further with the above requirement. Hope this helps.

Kindly mark this as solved if it's resolved.

Thanks,
Nagendra