.JSX file extension
To open .JSX files on Windows, right-click the .jsx file → Open with → Visual Studio Code (or another code editor).
Open a .jsx file with a source-code editor such as Visual Studio Code to read or edit it. To run it in an app or browser, it’s usually transformed into regular JavaScript as part of a build step (for example with Babel’s JSX transform or TypeScript’s JSX support).
Last updated: June 12, 2026
Open on your device
Choose your operating system for a dedicated step-by-step opening guide.
How to open .JSX files
Use these platform-specific instructions to open .JSX files safely.
Windows
- Right-click the .jsx file → Open with → Visual Studio Code (or another code editor).
- If you need to run/build it, open the project folder in your build toolchain (for example a React/Babel or TypeScript setup) and run the project’s build or dev command so JSX is transformed to JavaScript.
Mac
- Control-click the .jsx file → Open With → Visual Studio Code (or another code editor).
- To execute it as part of an app, use the project’s build tooling so JSX is compiled into JavaScript (commonly through Babel or TypeScript).
Linux
- Open the .jsx file in a code editor such as Visual Studio Code.
- To run it, build the containing project so JSX is transformed into standard JavaScript (for example using Babel’s JSX transform or TypeScript JSX compilation).
iOS
- iOS does not commonly run or build JSX directly; open it only for viewing/editing in a text/code editor app, or transfer the file to a desktop environment for proper React/Babel/TypeScript build tooling.
Android
- Android does not commonly run or build JSX directly; open it for viewing/editing in a text/code editor app, or move it to a desktop environment to compile it with a typical React/Babel/TypeScript toolchain.
Security notes
- .jsx files are executable source code in a JavaScript toolchain: if you build or run a project containing untrusted .jsx, you may execute untrusted logic during development or build steps.
- JSX is typically transformed into JavaScript (for example by Babel or TypeScript); treat the transformation/build pipeline as part of the attack surface when working with untrusted projects (malicious code can run during builds/tests).
- On the web, do not assume there is an official, IANA-registered MIME type specifically for JSX; relying on non-standard types (often seen as “text/jsx”) can cause inconsistent handling across servers and clients.
If you did not expect this file
This extension is usually plain data, text, or structured content—not a program by itself. The practical risk is social engineering (a scam attachment or misleading filename). For trusted senders you rarely need heavy-handed antivirus wording; use these tools when you want an extra check on unexpected downloads.
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Can't open this file?
These are the most common causes and fixes when .JSX files fail to open.
Common reasons
- The browser/runtime throws a syntax error on JSX tags
- Build compiles, but JSX output is wrong for your React setup
- Editor shows JSX as plain text or has poor IntelliSense
Fix steps
- Ensure your project uses a JSX transform step (for example Babel’s React JSX transform or TypeScript JSX compilation).
- Build or run the project through its toolchain instead of opening the .jsx file directly in a browser.
OS-specific troubleshooting
What is a .JSX file?
JSX is a syntax extension to JavaScript that lets you write XML-like tags inside JavaScript code. It is widely used with React to describe UI components and is commonly stored in files with the .jsx extension. Tooling typically transforms JSX into standard JavaScript before execution.
Background
JSX is best known as the markup-like syntax used with React to write component render output in a way that resembles HTML, while still being JavaScript. React documentation describes JSX as the commonly used (and preferred) way to write React components.
A .jsx file is not a separate “binary format”; it’s plain text source code. Because browsers and many runtimes do not natively execute JSX syntax, projects usually include a compilation/transformation step that converts JSX into JavaScript function calls.
Common toolchains include Babel (via its React JSX transform plugin) and TypeScript’s JSX support, which can compile JSX according to your configuration. In editors like Visual Studio Code, JavaScript tooling can provide React/JSX-aware IntelliSense and editing features.
Further reading
Authoritative resources for more details on the .JSX format.
Common .JSX issues
The browser/runtime throws a syntax error on JSX tags
JSX is not standard JavaScript syntax in most runtimes, so running a .jsx file directly often fails unless it is transformed first.
- Ensure your project uses a JSX transform step (for example Babel’s React JSX transform or TypeScript JSX compilation).
- Build or run the project through its toolchain instead of opening the .jsx file directly in a browser.
Build compiles, but JSX output is wrong for your React setup
JSX compilation behavior depends on tool configuration (for example, which JSX runtime/transform is used). Misconfiguration can change what JavaScript is emitted.
- Review your JSX-related configuration in your compiler/transpiler (TypeScript JSX options or Babel JSX transform settings).
- Align the project’s React/JSX documentation and tool settings so the JSX transform matches your intended runtime.
Editor shows JSX as plain text or has poor IntelliSense
If the editor is not treating the file as JavaScript with JSX, you may not get syntax highlighting, formatting, or code assistance.
- Use an editor with JavaScript/React tooling (for example Visual Studio Code’s JavaScript support).
- Verify the file is recognized as JavaScript/JSX in the editor and that relevant language features/extensions are enabled.
FAQ
Is a .jsx file the same as a .js file?
Both are JavaScript source files, but .jsx commonly indicates the file contains JSX syntax (XML-like tags) in addition to regular JavaScript.
Can browsers open .jsx files directly?
Typically no. JSX usually must be transformed into standard JavaScript before it can run; this is commonly done by tooling such as Babel’s JSX transform or TypeScript’s JSX compilation.
What should I use to edit .jsx?
A code editor with JavaScript/React support is ideal. Visual Studio Code documents JavaScript tooling and features that work well with React/JSX editing.
Is “text/jsx” an official MIME type?
It is commonly referenced, but it is not registered with IANA, so you should not assume it is an official standardized media type.
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