# What Is an ASPX File and How to Use It

> This article explains what ASPX files are, how they're used, what to do if you download one by mistake, and how to convert them to a more usable format. What Is An ASPX File?

- **Source:** [Lifewire](https://www.lifewire.com/what-is-an-aspx-file-2619705?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=68b5bc55a9db08f828cafafb)
- **Published:** 2025-09-01
- **Category:** Apps
- **Tags:** #microsoft #aspx #file #active #article #called #convert #download
- **Canonical:** http://localhost:4321/a/68b5bc55a9db08f828cafafb

---

_GearOpen's distilled summary. The full original article is published at Lifewire (source link above); GearOpen does not republish the source's full text._