Run Javascript
Developer Tools
Run custom Javascript, each time you visit a website
Users
20K
Rating
4.1
Reviews
50
7D Growth
0|0%
Stable signalUnknownHigh-risk permissions
Inject JS - Run JavaScript code
Inject js on any website Run JavaScript code
Users2KCurrent public install base
Rating4.9Store average score
Reviews16Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
3 assetsInject JS - Run JavaScript code Media preview
Trend
User growth trend
Review user movement across collected snapshots.
User Growth Over Time
Rating trend
7-day rating trend
View collected rating snapshots from the latest 7-day window to assess rating stability.
7-day rating change
Start
4.88
Latest
4.88
7-day rating change
0.00
2026年7月14日2026年7月20日
Growth overview
Daily, weekly, and monthly growth
Compare 1-day, 7-day, and 30-day net growth and growth rate.
1-day growthFlat
00%7-day growthFlat
00%30-day growthFlat
00%Technical snapshot
Version, languages, and crawl freshness
Review publication date, version, supported languages, and crawl timestamps.
Version1.2
ManifestV3
Size394KiB
Languages1English
Published
Store updated
Last crawled
English
Overview
Product summary
Review the store description, core capabilities, and common use cases.
A powerful browser extension that allows you to instantly inject and execute JavaScript code on any website. Perfect for web developers, testers, and power users who need to customize web page behavior on the fly.
Key features:
Execute custom JavaScript code on any website with a single click
Save and manage multiple scripts for different websites
Automatic script injection based on domain rules
Multiple injection methods to bypass various CSP restrictions
Reviews
Recent review snapshot
Inspect the latest comments and rating distribution.
Store average score4.9Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.9Average computed only from synced review bodies below
Reviews with text15Synced review bodies
Total ratings / reviews16Chrome Web Store public rating/review count
Store average score: 4.9. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
Related products
Similar and related extensions
Review related products from the Chrome Web Store detail page.
Scripty - Javascript Injector
Workflow & Planning
Inject your Javascript into the webpage
Users
20K
Rating
3.8
Reviews
103
7D Growth
0|0%
Custom JavaScript for Websites
Accessibility
Inject custom JS into the current domain.
Users
1K
Rating
5.0
Reviews
3
7D Growth
0|0%
User JavaScript and CSS
Developer Tools
User JavaScript and CSS on any website
Users
200K
Rating
4.8
Reviews
657
7D Growth
0|0%
InjectJS – JavaScript Injector & Custom Script Manager
Developer Tools
Inject custom JavaScript (JS) into any webpage, automate tasks, and manage scripts. Ideal for developers and power users.
Users
751
Rating
4.6
Reviews
10
7D Growth
+46|6.52%
JavaScript Tools
Workflow & Planning
Easily run code snippets on any website quickly!
Users
160
Rating
5.0
Reviews
1
7D Growth
-3|-1.72%
Does it support to test js in the fly without having refresh page to apply the code?
Works perfectly! Thanks Todd Yee!!!
works
use this before try anything else
Best extension working for javascript
Please add a timing functionality. As it stands, the scripts are executed on page load by default, which is problematic because a lot of the time an extension like this is actually most useful for executing scripts first thing when the page starts loading which cannot be achieved manually via the console. A manifest V2 discontinued extension that did this best had this as a checkbox option for each script you created. To summarize, it would be amazing if you could add the following functionality: 1. Run on Page Load (checkbox. Script runs first thing when the page loads if not checked). 2. iFrame support - check whether you want the script to run only in the parent frame or also inside iFrames on the page. (checkbox. unchecked by default) 3. Support regex for URL whitelisting instead of only explicit domain or URL definitions. Thank you for your consideration. I realize that this is a free extension so I'm in no position to demand anything, but I really think these extra features will go a long way in making this the best JS injector extension out there. Cheers.
Great thanks very much <3
非常好用的插件，感谢分享，五分好评，推荐大家试用一下。
迄今为止最好用的JS插件，反复用反复爱！
This plugin is fantastic! It's incredibly useful and works really well for me. Highly recommended.