Custom Script Injector icon

Custom Script Injector

by tomelilla.tw · Developer Tools
Manifest V3 Free
View in Chrome Web Store Data as of 16 Oct 2026

Inject custom CSS and JavaScript into websites.

Users
35
−3 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#124K
#103K among extensions
Version
1.3.3
updated 12 Dec 2025

Users

monthly, 10 months
02754Dec 2025Jun 2026Oct 2026
Latest, 16 Oct 2026: 35 usersMove the mouse over the chart for any month

Ratings count

monthly, 10 months
001Dec 2025Jun 2026Oct 2026
Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Custom Script Injector

# Chrome Web Store Store Listing This document contains the text required for publishing to the Chrome Web Store. ## 1. App Name `Custom Script Injector` ## 2. Short Description **Limit: 132 characters** Inject custom CSS and JavaScript into any website. Features CSP bypass, CodeMirror editor, hot reload, and GitHub Gist sync. --- ## 3. Description Want to customize the style or behavior of your favorite websites? **Custom Script Injector** is your best choice! This powerful developer tool allows you to write and inject custom CSS and JavaScript into any webpage. ### ✨ Key Features * **🛡️ Advanced CSP Bypass** Inject and execute JavaScript even on websites with strict Content Security Policy (via `declarativeNetRequest` and `executeScript` in MAIN world). * **🎨 Syntax Highlighting** Integrated **CodeMirror 5** editor with Monokai theme for a premium coding experience. * **⚡ Hot Reload** Scripts apply immediately upon saving. No manual page refresh needed. * **☁️ Cloud Sync** Backup and restore your scripts using **GitHub Gist**. Keep your snippets synchronized across devices. * **🌍 Internationalization** Supports English, Traditional Chinese (`zh_TW`), Simplified Chinese (`zh_CN`), and Japanese (`ja`). * **⌨️ Shortcuts** Support `Ctrl+S` / `Cmd+S` to save your code quickly. ### 🔒 Privacy & Security * **Local First**: All scripts and settings are stored locally in your browser. * **Your Data**: If sync is enabled, data is only transmitted to your personal GitHub Gist. * **No Tracking**: We do not collect any browsing history or usage data. --- ## 4. Category `Developer Tools` ## 5. Language `English`

Growth

WindowUsersChangeRatingsRating
7 days−3−7.9%00.00
30 days−3−7.9%00.00
6 months+4+12.9%00.00

Chrome Web Store search rankings

Where Custom Script Injector appears when people search the store, with the 30 day change
Search phrasePosition30 days
inject#88new
script#97new

Version history

1 versions recorded
1.3.312 Dec 2025

Details

Category
Developer Tools
First seen
12 Dec 2025
Size
112 KB
Languages
en, zh-CN, zh-TW, ja
Pricing
Free
Privacy policy
raw.githubusercontent.com
Extension ID
ffdmgglimnfgemlddikeiclocldmjjci

Permissions and risk

Moderate riskimpact 2, likelihood 2
Permissions
storagescriptingactiveTabdeclarativeNetRequest
Site access
<all_urls>
Can read and change data on every website you visit.

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