Which file format is NOT commonly used for uploading feeds?

JIRA is primarily a project management tool used for tracking issues and managing projects, not a file format. Commonly used file formats for uploading feeds typically include CSV, TXT, and JSON, which are designed to structure data in a way that can be easily processed and imported into various systems.

CSV (Comma-Separated Values) is a widely used format for tabular data, TXT (plain text) can also be used for simple data representations, and JSON (JavaScript Object Notation) is a popular format for structured data that is easy to read and interact with in web applications. Therefore, among the choices provided, JIRA stands out as it does not represent a file format but a software application, making it the correct answer to the question regarding file formats commonly used for uploading feeds.