Chrome extension source viewer

How to install an extension Open in Chrome Web Store

CRX ID

jifpbeccnghkjeaalbbjmodiffmgedin

Status

Extension status: Featured

Description from extension meta

View source code of Chrome extensions, Firefox addons or Opera extensions (crx/nex/xpi) from the Chrome web store and elsewhere.

Image from store

Description from store

View the source code of any Chrome extension in the Chrome Web store without installing it.

Features:
- Button at the Chrome Web store
- Download extension as zip file
- View source
- Configurable via context menu on button: Set one-click action via "primary action on click".
- View source:
- File name/type filter
- Search in the file content (literal or regexp)
- Automatic beautification (formatting) of code
- Syntax highlighting
- Show hashes (md5, sha1, sha256, sha384, sha512) of individual files
- Image preview
- View embedded zip files
- View any zip file by URL or file chooser
- View source of platform-specific extensions (such as Chrome OS-only extensions, or NaCl for a different architecture).
- Permalink to file and search result within a zip or extension file.
- Full support for incognito mode.
- Outputs public key and extension ID to the console.

Optional features (see options page):
- View source of Opera 15+ extensions, Edge extensions, Firefox addons or Thunderbird add-ons.
- "View extension source" contextmenu item on links to Chrome extensions
- View source of Chrome extensions outside the webstore. The View source button becomes visible when you select a CRX file for download.

Source code: https://github.com/Rob--W/crxviewer
Online demo: https://robwu.nl/crxviewer/
Contact: [email protected]

Change log:
- 1.2.3:
Add "downloads" permission to make sure that the "Download" button always works as intended.
- 1.2.4:
Add extra parameters to the CRX URL to make sure that CRX files of extensions uploaded to the Chrome Web Store after July 2014 are correctly read.
- 1.2.6: Sync options, use optionsV2, show numeric progress instead of dots, updated JSBeautifier, restore font size.
- 1.2.7: Bugfixes (viewer height, checkbox filter).
- 1.3:
Support Firefox addons (also available as a Firefox addon!)
Search within files
Customize webstore download parameters
View embedded zip files and any zip file
- 1.3.1: Use correct URL for loading extension files.
- 1.3.2: Bugfix to allow unusual extension URLs to be opened again.
- 1.4: New syntax highlighter, improved search controls, improved word wrap.
- 1.5: Calculate hashes, add link to Github project page, bugfix for case-sensitive search.
- 1.6: Improved search highlighting & also search in beautified content.
- 1.6.2: Configurable "primary action on click", open new tab next to current tab.
- 1.6.4: Support the new CRX3 Chrome extension file format (#62).
- 1.6.6: Permalink support, Firefox add-on finder.
- 1.6.7: Fix broken extension due to bug with storage access and NativeCrxBindings.
- 1.6.8: Support CRX3 file format from CWS; support some other AMO domains.
- 1.6.9: Add option to add the context menu item to more links (#69), open new tabs via context menu next to current tab.
- 1.6.10: Improve syntax highlighting (perf, highlighting of WebAssembly source), show sum of file sizes.
- 1.6.11: Add "Extension ID" row at Analysis of manifest.json, improve CRX3 public key detection, improve zip fallback detection.
- 1.6.12: Support source viewing of Edge and Thunderbird extensions, recognize CRX3 from Opera, update beautifier.
- 1.6.13: Work around Chrome bug that broke the extension button (#120).
- 1.7.0: Support new Chrome Web Store (#134), and migrate to Manifest Version 3.

Latest reviews

Venkatesh Kumar 2025-09-07: Some people have viewed it Udr-friendly
Joseph Braun 2025-08-06: Bestttt Working..
Josie Hoffman 2025-05-23: verry usefull, the beautify code button especaly
Mythical 5th 2025-03-08: Very useful. I used this extension to check whether it needed the tabs permission. It doesn't, it could use activeTab instead, so I have knocked 1 star off.
Maroš Jendrál 2025-01-13: Doesn't work
shishak_ne 2024-10-27: thx for author, very usefull extention <3
Anoir Ben Tanfous 2024-08-29: Very good, I hope that this gets developed further to add some tools like for deobfuscation and code analysis for malwares etc using AI...
Derek Yanov 2024-08-02: The best 👍
Doan Vu 2024-03-05: Great extension! Help me learn a lot about making browser extensions. Big thanks!
Greg E 2024-02-16: Awesome extension that works well with Brave. To use this effectively, what I had to do: - Go to Settings -> Extensions - Find Chrome Extension source viewer and click Details - Enable "Pin to toolbar" Now when you go to an extension page, you can click the yellow "CRX" icon to view or download the extension. It's already saved me from at least 2 sketchy extensions that were trying to do WAY more than they should.
Love Da 2024-02-14: Did nothing
M MT 2024-01-28: Works great, would be really helpful if you could add time of vote too.
Hubert Gravel 2024-01-24: Does what i downloaded it for
Gea-Suan Lin 2024-01-22: It works perfectly to allow users reviewing through source code before installation.
Garbouw Deark 2023-12-22: Only stopped working briefly because Chrome Web Store changed some stuff. The devs were quick on the mark and got it running again. It's a good tool for a number of reasons, but I like to use it to make modifications to existing extensions for personal use, as well as learn from those extensions so I can properly make my own.
Michael Barrett 2023-12-11: This awesome extension has been updated and now works perfectly on the new Chrome Web Store. The source code has been rewritten to work flawlessly under Google's Manifest Version 3. If you're an avid user like me, you should have received the automatic update and you know how much this extension adds to the feeling of security when installing an extension. If you don't already have this installed, you should. It gives you the ability to view and inspect the source for any malicious code BEFORE you click the "Add to Chrome" button. Review updated Dec 11, 2023
Ishan 2023-11-16: Not working any more, icon always remains discoloured no matter which extension I visit. Probably new website chromewebstore.google.com is the reason.
Minh Quân Trần 2023-11-12: very good,but hope it's gonna work with new website chromewebstore.google.com
George Kolasa 2023-10-10: Excellent, thank you
George Kolasa 2023-10-10: Excellent, thank you
Loc Quan 2023-10-01: Works great for me
Loc Quan 2023-10-01: Works great for me
Mickaël BELLANGER 2023-08-29: A support for the new Chrome Web Store ? ( chromewebstore(dot)google(dot)com ) https://chromewebstore.google.com/detail/chrome-extension-source-v/jifpbeccnghkjeaalbbjmodiffmgedin
Mickaël BELLANGER 2023-08-29: A support for the new Chrome Web Store ? ( chromewebstore(dot)google(dot)com ) https://chromewebstore.google.com/detail/chrome-extension-source-v/jifpbeccnghkjeaalbbjmodiffmgedin
Obi Wan Kenobi 2023-08-19: works great and lots of options
Obi Wan Kenobi 2023-08-19: works great and lots of options
Jorgen Creeman 2023-07-23: Funktioniert sehr gut, besser als alle anderen Apps! 5 Sterne von mir!
Joey Chen 2023-07-22: This plugin is great, it is so convenient to see the source code, it saves a lot of time!
Joey Chen 2023-07-22: This plugin is great, it is so convenient to see the source code, it saves a lot of time!
Leb 2023-05-31: Every time I try to remove it it crashes chrome. Doesn't do it with any other extension. Seems like a virus
Leb 2023-05-31: Every time I try to remove it it crashes chrome. Doesn't do it with any other extension. Seems like a virus
Lục Phong 2023-03-15: easy to use
Lục Phong 2023-03-15: easy to use
Gabriel 2023-01-25: Just great. More transparency is needed about Chrome extension
Gabriel 2023-01-25: Just great. More transparency is needed about Chrome extension
Hubsha 2023-01-20: Works as intended.
Hubsha 2023-01-20: Works as intended.
Marcoo 2023-01-10: doesn't work on website that disabled it
Marcoo 2023-01-10: doesn't work on website that disabled it
Andrei Akopian 2022-12-28: This extension is perhaps the best one one can find. I managed to port half of the extensions I use to Opera GX within an hour while modifying half of them along the way.
Andrei Akopian 2022-12-28: This extension is perhaps the best one one can find. I managed to port half of the extensions I use to Opera GX within an hour while modifying half of them along the way.
shin atalier 2022-08-12: This is a great browser extension. It is very useful to use and easy to navigate
shin atalier 2022-08-12: This is a great browser extension. It is very useful to use and easy to navigate
thanhnam seo 2022-07-27: Very good!! thank you
thanhnam seo 2022-07-27: Very good!! thank you
Kim Birkeland Skorgenes 2022-07-12: Best extension checker This extension lets you check if other extensions are doing what they say is true. If not, report the malicious extensions.
Kim Birkeland Skorgenes 2022-07-12: Best extension checker This extension lets you check if other extensions are doing what they say is true. If not, report the malicious extensions.
green shell 2022-05-12: good and working app, might not be legal though
green shell 2022-05-12: good and working app, might not be legal though
IMUVI APP 2022-04-13: Actualmente no esta funcionando, necesita una actualizacion

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