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Converting m4a to aac is very easy, all you have to do is uploading a m4a file to our server and the conversion will start automatically. Your generated files can be accessed from 'MyFiles' page.
Converting m4a to aac speed is depending on two main factors, the first one is the size of your m4a file, and the second one is our server performance, which is very good.
No one has access to your uploaded m4a files and generated aac files except you, and you can delete them from 'MyFiles' page. In general your files will be deleted automatically if you stop browsing for an hour.
If there is any problem or you have a suggestion, we will be glad to hear from you on the following email address:
support (at) WebFiGen (dot) com