XEP may refer to:

• XEP (software), an XML to PDF converter
• Isthmian script (ISO 639-3 code)
• XMPP Extension Protocol, in the XMPP Standards Foundation
• Chi Epsilon Pi, a US honor society
• XEP-AM, a radio station in Mexico
• Épernay - Plivot Airport (IATA code), in the List of airports by IATA code
• Athis Airfield (IATA code), a former airport
• Swiss Cosmetic Activen Brand, a cosmetic active from a Swiss based company.