Framework Lens

Run Javascript

Run custom Javascript, each time you visit a website ⚡ Run custom JavaScript on any website — automatically, every time you visit. Save your scripts per domain. They execute on page load, every single time. No setup, no config files, no extra tools. Just your code running where you want it. 1. Visit any website 2. Click the Run JavaScript icon 3. Write or paste your custom JavaScript code 4. Save — your script auto-runs on every future visit to that domain Toggle scripts on/off per site with one click. Scripts persist across browser restarts. 🎯 WHAT YOU CAN DO ✅ Remove ads, popups, banners, cookie notices, and distracting elements ✅ Inject custom CSS — dark mode, custom themes, font changes, layout fixes ✅ Auto-fill forms, pre-select dropdowns, auto-click buttons ✅ Auto-run scripts on page load without manual intervention ✅ Extract data, scrape content, highlight information on any page ✅ Add features websites are missing — keyboard shortcuts, UI tweaks ✅ Automate repetitive tasks — clicks, form submissions, navigation ✅ Inject custom HTML elements, dashboards, or productivity widgets ✅ Test and prototype frontend code changes on live websites ✅ Debug and inspect page behavior with custom console scripts ✅ Modify DOM elements, rewrite page content, restructure layouts 💻 BUILT FOR DEVELOPERS ✅ Ace code editor with full syntax highlighting and auto-indent ✅ jQuery library included (1.12.4, 2.2.4, 3.3.1) — or use vanilla JavaScript ✅ Execute button for instant testing before saving ✅ Scripts stored per hostname using Chrome storage API ✅ One-click enable/disable toggle per domain ✅ Works on all http and https pages ✅ Manifest V3 — secure, fast, modern Chrome extension architecture ✅ Service worker background script — no performance overhead ✅ Sandboxed execution with duplicate run prevention → Web developers testing and debugging on production sites → Frontend engineers prototyping UI changes live → QA testers injecting test scripts and automation → Digital marketers running A/B tests and analytics scripts → Power users customizing websites to fit their workflow → Students learning JavaScript with real-world web pages → Automation enthusiasts replacing repetitive manual tasks → No data collection, no tracking, no analytics → No account required — works immediately after install → All scripts stored locally in your browser → Open source and transparent → Manifest V3 security standards → No external network requests Lightweight. Fast. Private. Just your JavaScript, running where you want it. Install now → click the icon → paste your code → done.

Library Detector (Academic Tool)

Detect JavaScript libraries used on the current web page. This tool is supported by academic software engineering researches. This open-source tool is developed to accurately detect libraries and frameworks running on the web. It collects 600+ most popular ones, pinpoints the version, and reveals those hidden by web packers or obfuscators. Usage: open a website, click on the icon of this extension (needs to be pinned in the extension bar in advance), and click on the "detect" button in the popup menu, then all the libraries loaded by the website will be displayed. All the detection features used in this extension are auto-generated by the algorithm proposed in recent research papers, ensuring the soundness of detection results. More libraries will be covered in later releases. For further information visits GitHub: https://github.com/aaronxyliu/PTV. Feedback please send to aaronxyliu@gmail.com.

Enable JavaScript

Use a single button to turn javascript on or off on the Google Chrome Tab you are in. You might want to turn off javascript to help debug a webpage/check your website code errors. Turn javascript on/off with a button. To begin using the software, you need to install the extension first. Once you are on the website you wish to turn javascript off, just click on the software extension to switch it off . You can turn javascript back on for that webpage by clicking on the extension icon again. Disclaimer: Please note this extension is NOT made by Google and is made by an independent development team. All copyrights belong to their respective owners. Google doesn’t endorse or sponsor this Chrome extension. Enable Javascript is not owned by, is not licensed by and is not a subsidiary of Google Inc.

Netcraft Extension

Comprehensive site information and protection from phishing and malicious JavaScript when browsing the web The Netcraft Extension is a tool allowing easy lookup of information relating to the sites you visit and providing protection from phishing and malicious JavaScript. What's new in v2.1.2? • Improved caching of our feed to reduce network traffic. Key Features: • Protection against phishing sites — The Netcraft anti-phishing community is effectively a giant neighbourhood watch scheme, empowering the most alert and most expert members to defend everyone within the community. As soon as the first recipients of a phishing mail report it, we can block it for all users of the extension providing an additional level of protection from Phishing. Netcraft processes reports of fraudulent URLs from a diverse variety of sources and proactively searches for new fraudulent sites. • Protection against malicious JavaScript — Prevent your credit card details from being stolen by shopping site skimmers or your computer's processing power being harvested by web miners. Netcraft has been detecting shopping site skimmers, web miners, and other malicious JavaScript since 2017. The extension blocks sites that we have found to be compromised with malicious JavaScript. Additionally, it detects JavaScript that we have identified as being malicious, blocks pages that use it from loading, and automatically reports them to Netcraft to protect the rest of the community. • Detailed site reports – simply click the Netcraft logo to access a wealth of information about the sites you visit, helping you to make informed choices about their safety. • Conveniently report suspected phishing & fraudulent sites – At the click of the button you can report suspected web forgeries to Netcraft, helping to protect the community. Netcraft operates an incentive scheme for Phishing site submissions, including iPads, backpacks, mugs, and more… https://report.netcraft.com/pages/report-incentives Find out more about the Extension at: https://www.netcraft.com/apps-extensions/browser-extension/ About Netcraft: Netcraft is an Internet services company based in Bath, England. We provide a range of services relating to internet data analysis, defences against fraud and phishing, web application security testing, and automated network scanning. In particular, Netcraft’s anti-phishing services are very widely licensed, ultimately protecting hundreds of millions of people. https://www.netcraft.com Privacy Policy: https://www.netcraft.com/privacy/