Free & Open Source v1.0.0

View the Source Code
of Any Extension

Instantly inspect, analyze, and download the source code of any Chrome, Firefox, or Edge browser extension — with beautiful syntax highlighting and auto-beautification.

Add to Chrome — It's Free Learn More ↓
chrome-extension://… /viewer.html?extId=epbobagokhie…
1"use strict";
2(function() {
3 var cR = Object.create;
4 var Za = Object.defineProperty;
5 var Xb = Object.getOwnPropertyDescriptor;
6 var Qb = Object.getOwnPropertyNames;
7 var e6 = Object.getPrototypeOf;
8 // Auto-beautified from minified source
9 var a = (e, t) => Za(e, "name", {
10 value: t,
11 configurable: !0
12 });

Everything You Need

Powerful tools to inspect any browser extension's source code, right from your browser.

Syntax Highlighting

Beautiful color-coded source with support for JavaScript, TypeScript, HTML, CSS, JSON, and more.

Auto-Beautify

Minified code is automatically formatted with js-beautify on load. Clean, indented, readable code instantly.

Content Search

Search across all files instantly with text or regex. Find API keys, permissions, or tracking code.

Download Source

Download as ZIP or original CRX. Save individual files or the complete file tree offline.

File Browser

Complete folder tree with file type icons, size indicators, and filters for Images, Code, Markup, and more.

File Checksums

Verify integrity with MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes.

How It Works

1

Install the Extension

Click "Add to Chrome" and pin to your toolbar. Works on Chrome, Edge, Brave, and any Chromium browser.

2

Visit Any Extension Page

Navigate to any extension on Chrome Web Store, Firefox Add-ons, or Edge Add-ons.

3

Click "View Source"

Click the CRX icon and hit "View Source". Code is downloaded, extracted, and auto-beautified instantly.

4

Inspect, Search, Download

Browse files, search across code, view hashes, download as ZIP. Everything runs locally — no data sent anywhere.

Frequently Asked Questions

Common questions about CRX Source Viewer

Is it safe to use?

Yes. Everything runs locally in your browser. No data collection, no external servers. Only fetches CRX files from Google's official servers.

Does it work with Firefox add-ons?

Yes! Supports Chrome Web Store, Firefox Add-ons (AMO), and Microsoft Edge Add-ons.

Is it free?

Completely free. No hidden charges, no premium tiers, no ads.

Can I open local files?

Yes. Drag and drop any .crx, .xpi, or .zip file directly onto the viewer. Everything processed locally.

Ready to Inspect?

Join thousands of developers who use CRX Source Viewer to understand, audit, and learn from browser extensions.

Add to Chrome — It's Free