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Custom Script Injector

ExtensionDeveloper Tools19 users
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Item media 1 (screenshot) for Custom Script Injector
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Overview

Inject custom CSS and JavaScript into websites.

# 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`

Details

  • Version
    1.3.3
  • Updated
    December 12, 2025
  • Offered by
    tomelilla.tw
  • Size
    112KiB
  • Languages
    4 languages
  • Developer
    Email
    tomelilla.tw@gmail.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization
The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes
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