How to open .CRX files on Mac
To open .CRX files on Mac, if you want to install it: open a Chromium-based browser that supports CRX extension installation (for example, Google Chrome).
Step-by-step instructions
- If you want to install it: open a Chromium-based browser that supports CRX extension installation (for example, Google Chrome).
- Use the browser’s extensions management page to add the extension; if installation is restricted, use your organization’s approved method for installing extensions.
Common issues
Browser refuses to install the .crx file
Many Chromium-based browsers restrict or block direct CRX installs (especially outside official stores or when not allowed by policy).
- Confirm you are using a Chromium-based browser that supports extension installation (Chrome, Edge, or another Chromium-based browser).
- If the system is managed (enterprise), use the organization’s approved deployment method for extensions rather than manual installation.
Web server download/install fails for a hosted CRX
If a CRX is hosted for installation, an incorrect HTTP Content-Type can prevent correct handling by the browser.
- Configure the server to serve .crx with Content-Type application/x-chrome-extension.
- Re-download and try again after confirming the correct response headers.
Trying to open it like a normal ZIP doesn’t work
A CRX is not just a ZIP; it has a CRX header before the ZIP payload, so some archive tools may not recognize it directly.
- If you only need to inspect the extension files, use tools or workflows that can handle a CRX header plus ZIP payload (the ZIP archive is appended after the CRX header).
- If your goal is installation, install it through a Chromium-based browser rather than extracting it.
Security note
A .crx installs browser extension code, which can read/modify web pages and access browser extension APIs; only install CRX files from sources you trust.