View source code of Chrome extensions, Firefox addons or Opera extensions (crx/nex/xpi) from the Chrome web store and elsewhere.
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
- (2023-10-10) George Kolasa: Excellent, thank you
- (2023-10-01) Loc Quan: Works great for me
- (2023-08-29) Mickaël BELLANGER: A support for the new Chrome Web Store ? ( chromewebstore(dot)google(dot)com ) https://chromewebstore.google.com/detail/chrome-extension-source-v/jifpbeccnghkjeaalbbjmodiffmgedin
- (2023-08-19) Obi Wan Kenobi: works great and lots of options
- (2023-07-23) Jorgen Creeman: Funktioniert sehr gut, besser als alle anderen Apps! 5 Sterne von mir!
- (2023-07-22) Joey Chen: This plugin is great, it is so convenient to see the source code, it saves a lot of time!
- (2023-05-31) Leb: Every time I try to remove it it crashes chrome. Doesn't do it with any other extension. Seems like a virus
- (2023-03-15) Lục Phong: easy to use
- (2023-01-25) Gabriel: Just great. More transparency is needed about Chrome extension
- (2023-01-20) Hubert Ropa: Works as intended.
- (2023-01-10) Marcoo: doesn't work on website that disabled it
- (2022-12-28) Andrei Akopian: 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.
- (2022-08-12) shin atalier: This is a great browser extension. It is very useful to use and easy to navigate
- (2022-07-27) thanhnam seo: Very good!! thank you
- (2022-07-12) Kim Skorgenes: Best extension checker This extension lets you check if other extensions are doing what they say is true. If not, report the malicious extensions.
- (2022-05-12) green shell: good and working app, might not be legal though
- (2022-04-13) IMUVI APP: Actualmente no esta funcionando, necesita una actualizacion
- (2022-03-07) James Taylor: Works just as it says, with no ads while being free. If you're developing a Chrome extension or app, then this extension is a must-have, without a doubt.
- (2022-01-29) Carles A: Doesn't seem to work anymore. Is this project dead?
- (2021-11-29) halil emre özen: I love this extension! I don't install extensions to my browser without reading source code because the chrome extension market has lots of malicious extensions that inject scripts, replace contents and with this extension, my investigation process is much faster than manually downloading extensions. if it adds Monaco editor as a code editor it would be much nicer to explore the code for bigger extensions.
- (2021-11-09) Yup Pl: extension is soo good, i can download the extension as a zip and use that extension on firefox or the other way around, i can now use firefox addons on chrome thanks!!!
- (2021-10-15) K K: このアプリのお陰でインストール不可能だったcrxファイルが開けるようになりますた。 Thanks to this app, crx files that could not be installed can now be opened.
- (2021-10-03) Tonatiuh Moctezuma: Por los comentarios al parecer dejo de funcionar en 2018...
- (2021-09-30) Harsh Shroff: Phenomenal
- (2021-09-22) Pedro López Escudero: Wonderful extension to learn how other extensions are made without having to download them. As a possible improvement it would be that some highlight could be added. Maravillosa extensión para aprender como están hechas otras extensiones sin necesidad de descargarlas. Como mejora posible sería que se pudiera agregar algo de highlight.
- (2021-08-11) Libor Vaňura: it works, not on chrome but on firefox perfectly! thx
- (2021-07-07) ̇j: don't know much about css and js but i can read a bit cool also i'd like to ask why everyone's google name is their real name
- (2021-06-21) 춘배: 딱조타이기야
- (2021-06-17) Muhammed Irfan: fantastic. I used this to clear an extension's bug
- (2021-05-25) pier wu: 显示停用了是什么情况 ?能恢复吗?
- (2021-03-02) Willie Wen: What a great extension! It works perfectly. Thank you
- (2021-01-30) Sebi: simple yet powerful
- (2020-11-10) علي رضا الأسدي: the best extension available
- (2020-10-13) J. Salmonson: Doesn't work at all noting pops up, noting opens up and can't find it on the right click mouse menu either. I'm using Brave browser, fix this please! I want to be able to view source code and copy it like everyone could years ago,it's the best way to learn how to code this new stuff that's out now.
- (2020-09-10) sei shin: Super, thank you.
- (2020-09-08) Heath H-M: Gotta say... this has saved me a lot of stress & time. Great job!
- (2020-09-04) Jimmie Butler: Works great, but would be useful if you could get the raw url of the extension download, rather than just downloading.
- (2020-08-01) Darren de Lima: Works well, lets you download chromium extensions easily. Doesn't work for Edgium extensions though.
- (2020-04-06) Деловой Пун: Добавьте в расширение, кнопку СКАЧАТЬ CRX!
- (2020-02-18) Varnox Agar: Very good.
- (2020-01-15) Евгений Бунегин: То, что нужно
- (2020-01-04) Alex SD: macht was es soll, nützlich, informativ, dezent... alles in allem sehr hilfreich!
- (2019-12-22) Saul Lopez: I don't really use checked much, but I will rate as you are. Please remove the right click feature. Suggest adding a button onto the page if you can instead. Clicking extension is just as good.
- (2019-12-04) Reth Hard: This is a very good extension! I'm using it to inspect the code of some extensions before installation. Many of them are collecting your data and it's not bad to avoid this kind of malware... I also use it for downloading the CRX files of my favorite addons, just in case they are removed from the store or something like that. There is many other extensions that are supposed to allows you to download the CRX files but most of them are very bad, the downloaded CRX files are not containing the key that allows you to install it normally. The CRX downloading function of this extension is working perfectly and you can install the CRX files just by drag-n-drop into the browser window, no needs to add any registry keys for white-listing the extension. Thank you Rob W. for this great extension!
- (2019-10-22) Marcus Parsons: Just what I needed!
- (2019-09-21) Ephellon Grey: Very useful for finding random bugs and sending reports, I can just come here and check the source(s).
- (2019-09-19) Fletch Burns: Thank you!! Helped solve a problem with old Chrome themes I had
- (2019-08-27) Tony Wilford: Just remembering to review this. I've been using it for several MONTHS though. It's great! It does exactly what it's supposed to do and without any errors. (for ME at least)
- (2019-06-21) Bill A: Just what the doctor has ordered for CRX files ;) I've noticed that the downloaded file size is always a few KB larger than the one downloaded though any of those web based extension downloaders ( https://chrome-extension-downloader.com/ ). Once I unpacked both and did a binary comparison, they appear to be completely identical, so I'm assuming it's just the packer code being slightly different. I wonder which one has the original packer code exactly as on the Chrome store? Yes, I'm nitpicking, but it's just good old OCD. ;D
- (2019-06-20) Ben Cheshire: Perfection.
Statistics
Installs
100,000
history
Category
Rating
4.5948 (422 votes)
Last update / version
2023-12-11 / 1.7.0
Listing languages
en