What Is a .jsx File? .jsx Format, MIME & How to Open

Quick facts

Extension.jsx

File typeJSX File

MIME typetext/jsx

CategoryData & Text

Charset—

CompressibleYes

Format familyjavascript

What is .jsx

What is a .jsx file?

A .jsx file is a JSX File — JavaScript file containing JSX syntax for React.

In the mime-db registry it maps to text/jsx, and it is marked as compressible. When serving .jsx over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to text/jsx and is used by JavaScript among others — and is delivered over HTTP via the Content-Type header.

How to open .jsx files

Use VS Code or React to open and edit .jsx files.
Any text editor (Notepad, VS Code) can inspect the raw content as text.

Developer info

When served over HTTP, responses should set the following header:

Content-Type: text/jsx

Common software that reads/writes .jsx:

VS CodeReact

Relation chain

.jsxextension of

format

javascriptserved as

mime type

text/jsxsent via header

http header

Related extensions

Related MIME types

Related programming languages

JavaScript

.js ._js .bones

Common uses

Configuration files
Data interchange between systems
API request and response payloads
Logs and data exports

How to edit .jsx files

Open the file with VS Code, make your changes and save.
Most editors preserve the original formatting and encoding — avoid changing the charset.

How to create .jsx files

Create a new file and save it with the .jsx extension, or export this format from VS Code.

Frequently asked questions

What programs can open .jsx files?

Common options include VS Code, React. You can also open many of these files with built-in viewers or a browser.

How do I create a .jsx file?

Create a new file in any text editor or the app that owns the format and save it with the .jsx extension.

What is the relationship between .jsx and the text/jsx MIME type?

text/jsx is the media type identifier used for .jsx files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-08-18

Explore this reference