A file with the CRX file extension is a Chrome Extension file used to extend the functionality of the Google Chrome web browser through little programs that add additional features to the default browsing experience.
Most CRX files are downloaded through the Chrome Web Store, but since you can make your own Chrome extensions and install them offline, others may originate elsewhere or be loaded locally.
Some CRX files might instead be Links Games Course files or program files used by Autodesk's DWG TrueView program.
How to Open a CRX File
CRX files that are extension files are used by the Google Chrome web browser. Usually, CRX files are downloaded through Google's website and, therefore, installed to Chrome automatically and stored here by default:
However, this won't be the case for CRX files that you download outside of the Chrome Web Store.
You can install third-party, unofficial CRX files by accessing the chrome://extensions/ address in the URL bar in Chrome and enabling the Developer mode option at the top. Then, just drag and drop the CRX file into the Extensions window and confirm any prompts.
Learn how to add Chrome extensions to your browser if you need more help.
The Opera web browser can use CRX files, too, with the extension called Install Chrome Extension. The Vivaldi browser natively supports CRX based extensions as well.
Since a CRX file is actually just a renamed ZIP file, any archive/compression program, like PeaZip or 7-Zip (both free), should be able to open the file for expansion. However, doing this will only let you see the data that makes up the extension, not actually run the program.
Autodesk DWG TrueView uses CRX files, too, but the purpose for these files is unclear. The program most likely can not open CRX files, so they're probably just used by certain components of the software automatically and aren't intended to be opened manually.
If you find that an application on your PC does try to open the CRX file but it's the wrong application or if you would rather have another installed program open CRX files, see our How to Change File Associations in Windows guide for making that change in Windows.
How to Convert a CRX File
XPI (Firefox), EXE (Internet Explorer), and SAFARIEXTZ (Safari) files are similar to CRX files in that they're extension files used in those respective browsers. These formats, however, no matter their same intent (to extend functionality), can't be easily converted to or from each other's different formats.
However, one exception is that Chrome's CRX files can be installed in the Opera browser with the Download Chrome Extension mentioned earlier. This means you can install CRX files from the Chrome Web Store from right within the Opera browser.
You can also convert Opera extensions to Chrome extensions by renaming Opera's .NEX file to Chrome's .CRX file. This new CRX file must be installed to Chrome manually using the drag and drop technique explained above.
Keep in mind that CRX files are really just ZIP files, so you can actually rename the file to a .ZIP file to open it with a file zip/unzip program.
If you're looking to convert your CRX file to EXE for some kind of automatic install, your best bet is to try compiling it with an installer like Inno Setup.
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Still Can't Open the File?
Be careful to read the file extension correctly. Some file formats append a suffix to the end of the file that looks a lot like it reads '.CRX' when it's really a letter or two off.
For example, CRX files are spelled very much like CXR files but are not the same format. CXR files are FMAT Plate Results files used with the FMAT 8100 HTS System. Another example can be seen with CXX files that are C++ Source Code files used with Microsoft Visual Studio.
The point here is to check the file extension and then research accordingly, looking for any information you can on the format the file is in, which will help you find the right program that can open it.
Try to install an extension from outside the Chrome Web Store and Chrome will tell you that extensions “can only be added from the Chrome Web Store.” However, this message is incorrect – you can still install extensions from elsewhere.
This restriction is in place to prevent malicious websites from installing bad extensions, apps, and user scripts. You should only install extensions from legitimate websites you trust – the LastPass website, for example.
Manually Installing an Extension
To install an extension manually, click the wrench menu, point to Tools, and select Extensions to open the Extensions page.
If you’re seeing the message, Chrome has already downloaded the extension, app, or user script to your computer. You’ll find it in Chrome’s default download folder. Extensions and apps have the .crx file extension, while user scripts have the .user.js file extension.
If it didn’t download to your computer, right-click the extension installation link on the page and use the Save As option to save it to your computer.
Drag and drop the CRX (or user.js) file onto the Extensions page to install it.
You’ll be prompted to confirm installation of the extension, just as if you had installed it from the Chrome Web Store.
Always Allow Extensions From Outside the Chrome Web Store
If you frequently install extensions from outside the Web Store, you can allow extension installation from any website by adding a command-line flag.
To add a command-line option, you’ll have to edit the Chrome shortcut’s properties. To access these on Windows 7, assuming you launch Chrome from your taskbar, right-click the Chrome icon on your taskbar, right-click Google Chrome in the menu that appears, and select Properties.
If you launch Chrome from your Start menu or your desktop, right-click the shortcut on your Start menu or desktop instead.
Install Chrome Extension Using Crx File
Select the Shortcut tab and add the following text to the end of the Target box:
–enable-easy-off-store-extension-install
After changing this setting, close all Chrome windows and launch Chrome from the shortcut you modified. You may want to wait a few moments after closing all Chrome windows to ensure Chrome is no longer running in the background
Try to install an extension from a web page and you’ll see a familiar installation prompt – click Continue to the install the extension.
Changing Chrome Policies
Chrome includes policy settings designed for system administrators. If you use Chrome in your business and want to allow extension installation from a specific website or two, you can modify Chrome’s policies. This setting is changed in the registry on Windows, and in Chrome’s preferences files on Mac and Linux.
For example, on Windows, you could add the following registry entry to allow extension installation from lastpass.com:
SoftwarePoliciesGoogleChromeExtensionInstallSources1 = “https://lastpass.com/*”
For more information about this Chrome policy setting and other Chrome policy settings, consult the Policy List page on the Chromium Project’s website. Acrobat reader free download 10.
How does one install an extension for Chrome browser from the local file system?
CW Holeman IICW Holeman II
3 Answers
Found a set of instructions online for loading your own custom extension:
paradd0xparadd0x
What kind of extension is it? Is it a .CRX file? A (possibly ZIP’d) folder? A .JS user-script? The process differs for each.
SynetechSynetech
To install a user script, the file must have a suffix of
.user , like my_script.user.js .
CaquCaqu
Not the answer you're looking for? Browse other questions tagged google-chromegoogle-chrome-extensions or ask your own question.
I have an extension that was installed via Load unpacked extension. I packaged and saved it as a
.crx file. Now, when I drag it to Chrome, it won’t let me install from the .crx file and pops up the yellow bar saying that installation from that web address (file:///….crx ) is not allowed. It does this whether I drag it to to the extensions window, settings, or new tab.
How can I install extensions from locally stored
.crx files?
Don RhummyDon Rhummy
Browse other questions tagged google-chromeinstallationbrowser-addonsgoogle-chrome-extensionssecurity-warning or ask your own question.
Google Chrome has been blessed with a number of extensions that help expand the capabilities of one of the most used web browsers in the world. If you have taken a look at the Chrome Store, you know that there is an extension for almost anything you want to do with your browser. From download managers to DLNA controllers, Chrome has everything for you. Despite this, some useful extensions have not been able to make it to the store, and hence cannot be used by users like you and me. But wait, there is now a way for you to install extensions available outside the store in Chrome. Here’s how:
Note: Some extensions are not available in the Chrome store for security reasons. Before you bypass the Chrome store and install an extension manually, make sure that the extension you are installing is free of virus/malware.
In the example below, I will be installing an extension called “Google Stars” that is NOT available in the Chrome store. The procedure is the same for any extension you wish to install. All you need to have is the .crx file of the extension.
Related: 7 of the Best Chrome Extensions You Need to Try
Manually Installing an Extension in Chrome
1. Download the extension (.crx file) you want to install on your computer. Click on “Continue” when Chrome prompts you. It will then be downloaded to your computer.
Install Chrome Extension From Zip
2. Click on the three lines shown on the top-right corner in your browser, which will open a menu for you. Click on “Settings.” You will be redirected to your browser’s settings page.
3. Once on the Settings page, click on the “Extensions” link given in the left-hand side of your screen. It will take you to the extensions page that shows all the extensions you have installed in your browser.
4. On the extensions page, you should see a checkbox on the top saying “Developer mode.” Click on it.
5. Drag the .crx file and drop it onto the extensions page.
6. Once you have dropped the file, it will ask if you want to add the extension to your browser. Click on “Add” to manually install the extension.
Install Chrome Extensions Offline
7. When Chrome has finished installing the extension, you will see something like the following. It indicates the extension was successfully installed.
That’s it.
You have successfully sideloaded an extension in your Chrome that was unavailable in the official Chrome store. This way, you can add as many extensions in your Chrome as you want; just make sure you know what you are going to install so as to avoid any issues down the road.
Conclusion
Having the ability to manually install an extension lets you try out some of the extensions that are either in testing mode or have not been able to make their way to the official store, obviously for some reasons known only by the developer.
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