Download Chrome Extensions as CRX Files

Q: Why is the CRX file I downloaded not installing?

Chrome 73+ blocks .crx files that weren't downloaded directly by Chrome for security reasons. Solutions: use Developer Mode, use an enterprise policy, or use the extension ID to install through the Web Store normally.

Chrome extensions are distributed as .crx files — cryptographically signed ZIP archives containing the extension's manifest, scripts, and assets. While Chrome installs them automatically from the Web Store, there are many legitimate reasons to download the raw .crx file:

Security auditing — inspect what code an extension runs before installing it
Offline / air-gapped deployment — install extensions on machines without internet access
Cross-browser sideloading — install Chrome extensions in Brave, Edge, or Opera manually
Version archiving — preserve a known-good version before an extension auto-updates
Enterprise distribution — deploy extensions via Group Policy without requiring user Web Store access

The NexaTools Chrome Extension CRX Downloader fetches direct Google CDN download links for any Chrome Web Store extension — for free, with no account required.

⬇️ Download Any Chrome Extension as .CRX

Paste any Chrome Web Store URL or extension ID and get a direct Google CDN download link instantly. No account, no Chrome installation needed.

Open CRX Downloader →

How to Find a Chrome Extension's ID§

Every Chrome extension has a unique 32-character ID visible in its Chrome Web Store URL:

https://chromewebstore.google.com/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm
                                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                                      This is the Extension ID

You can also find the ID by:

Going to chrome://extensions in Chrome
Enabling Developer mode (top-right toggle)
The extension ID appears under each extension's name

How to Download a CRX File (Step-by-Step)§

Method 1 — NexaTools CRX Downloader (Easiest)§

Copy the Chrome Web Store URL or extension ID
Open NexaTools CRX Downloader
Paste the URL or ID and click Get CRX Link
Click the direct download link — the .crx file comes straight from Google's CDN

No Chrome required, no browser extension needed, works on Windows, Mac, and Linux.

Method 2 — Direct Google CDN URL (Manual)§

You can construct a direct download URL manually:

https://clients2.google.com/service/update2/crx?response=redirect&prodversion=130.0.0.0&acceptformat=crx3&x=id%3D<EXTENSION_ID>%26installsource%3Dondemand%26uc

Replace <EXTENSION_ID> with the 32-character extension ID. NexaTools does this automatically.

How to Install a .CRX File in Chrome, Brave, or Edge§

Chrome / Chromium (Developer Mode required)§

Open chrome://extensions (or brave://extensions / edge://extensions)
Enable Developer mode using the toggle in the top-right corner
Drag and drop the .crx file onto the extensions page
Click Add extension when prompted

Note: As of Chrome 73+, only extensions from the Chrome Web Store can be auto-installed without Developer Mode. CRX sideloading requires Developer Mode.

Enterprise Deployment via Group Policy§

For managing extensions across an organization:

Download the .crx file to a network share or local path
Use ExtensionInstallForcelist Group Policy key
Point to the local .crx path using the file:// scheme

How to Extract and Read a CRX File's Source Code§

A .crx file is a signed ZIP archive. After removing a small header, you can extract it:

Windows (PowerShell):

# Rename .crx to .zip and extract
Rename-Item extension.crx extension.zip
Expand-Archive extension.zip -DestinationPath .\extension-source

Linux / Mac:

unzip extension.crx -d extension-source
# or if that fails due to the CRX3 header:
dd if=extension.crx of=extension.zip bs=1 skip=16
unzip extension.zip -d extension-source

Once extracted, you can read the manifest.json to inspect permissions, content scripts, background service workers, and remote code loading.

Why Download CRX Files for Security Auditing?§

Before installing an extension from the Chrome Web Store, auditing its code is good security practice — especially for extensions requesting broad permissions like:

"permissions": ["tabs", "webRequest", "storage", "cookies"]
Access to <all_urls> (all websites)
Background scripts that run even when you're not using the extension

The CRX Downloader makes this easy — download, extract, and review the source before granting any permissions.

Frequently Asked Questions§

Is downloading Chrome extension CRX files legal?§

Yes. Chrome Web Store extensions are publicly accessible. Downloading the .crx file for personal use, auditing, or sideloading is not prohibited. Redistribution of paid extensions is a separate legal question.

Why is the CRX file I downloaded not installing?§

Chrome 73+ blocks .crx files that weren't downloaded directly by Chrome for security reasons. Solutions: use Developer Mode, use an enterprise policy, or use the extension ID to install through the Web Store normally.

Can I download any Chrome extension as a CRX, including paid ones?§

Yes — the CRX download URL works for any publicly listed extension. However, many paid extensions include server-side license verification and will not function without a valid license.

Does NexaTools store or cache extension files?§

No. NexaTools generates a direct Google CDN download URL — the .crx file is fetched directly from Google's servers to your browser. NexaTools does not proxy or store any extension data.

What is the difference between CRX2 and CRX3?§

CRX3 is the current Chrome extension format introduced in Chrome 73. CRX2 is the older format. Google's download API now returns CRX3 format. Both are signed ZIP archives, but CRX3 uses a different header structure.