Is it possible to set an encoding for a file that is uploaded via a VisualForce page? I am getting errors stating that the content of the uploaded file is not UTF-8 encoded. Ideally, the user would be able to specify the file encoding himself, similar to the Account and Contact import wizard.

  • You want to upload your files in static resource ?? Please provide more information !! Commented Jun 3, 2013 at 7:54
  • I just want to post a CSV file via a form and process its contents, not saving it in salesforce. Commented Jun 3, 2013 at 9:27

1 Answer 1


Assuming your CSV file is being processed by a VF controller as part of a binding from the apex:inputFile component to a controller variable of type Blob, then, if you want to manipulate the CSV contents in the controller, the Blob must be converted to a String using Blob instance method myBlob.toString().

This toString() method requires that the Blob contain only UTF-8 characters as all Apex string operations are done in UTF-8.

Conclusion, the uploaded file when presented to the VF page has to be in UTF-8 before the page action executes.

  • Thanks, that answers the question. Our "fix" is to extend our documentation so that users know how to produce valid UTF-8 documents. Salesforce drives me crazy sometimes… Commented Jan 14, 2014 at 10:57
  • Be sure to let your users know that MSFT Excel will not save CSV files in UTF-8 unless they start in UTF-8. You need to use Google docs, Open Office, or convert the file using Notepad or other text editor. If all the chars are ASCII A-Z, a-z, 0-9 and common punctuation, then ASCII = UTF-8
    – cropredy
    Commented Jan 14, 2014 at 20:28

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