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Witchcraft loads custom Javascript and CSS directly from a folder in your file system. Think GreaseMonkey for developers. Think Greasemonkey for developers. Witchcraft is a Google Chrome extension for loading custom Javascript and CSS directly from a folder in your file system, injecting them into pages that match their files names. It works by matching every page domain against script file names available in the scripts folder. For instance, if one navigates to `https://www.google.com`, Witchcraft will try to load and run `google.com.js` and `google.com.css`. Witchcraft also tries all domain levels. For instance, if one accesses `https://gist.github.com`, it will try to load, in this order: `com.js`, `github.com.js` and `gist.github.com.js`... and the same for CSS. All domain levels for which a script is found will be loaded, not just the first one. Whenever you edit or create new scripts, there's no need to reload anything other than the page where the scripts are supposed to run. This is what makes Witchcraft special and different than other popular scripting tools, like Greasemonkey or Tampermonkey. Since Witchcraft runs as a Chrome extension, it is also cross-platform. It has been tested on Windows, MacOS and Linux. * scripts are automatically updated after you edit them - no need to reload anything; * works on Windows, Mac and Linux; * handles both JS and CSS; * @include directive to load other JS/CSS files from inside your domain scripts. * custom server addresses (even remote ones) Please check the website if you want to learn more.
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.
Live editor for CSS, Less & Sass - Magic CSS
Run this extension and start writing your CSS/Less/Sass code which gets applied immediately. The code you write will be saved in the browser extension's storage space or the site's local storage. ✓ Live editor for CSS/Less/Sass code - Preview changes as you write code ✓ Autocomplete ✓ Live edit CSS files and auto-save on file system ✓ Open code editor in external window ✓ CSS reloader ✓ Option to reapply styles automatically ✓ Syntax Highlighting ✓ Auto-generate CSS selectors with point-and-click ✓ Emmet support ✓ Color picker ✓ Convert code from Less/Sass to CSS ✓ Beautify / Format code ✓ Minify code ✓ Highlight DOM elements matching the CSS selectors ✓ Option to load this extension in iframes as well ✓ Get SVG icons ✓ Lint CSS code This extension is available for: You might want to use it for: ➤ No need to refresh pages to test your CSS/Less/Sass code ➤ Auto-save your changes to filesystem as you write the code ➤ Reload CSS resources without refreshing the page ➤ Speed-up development by writing code directly on your page ➤ Develop and test your code before finalizing your changes ➤ Apply some temporary styles (like hiding some components) ➤ Do CSS changes on any website ➤ The CSS/Less/Sass code you write gets applied as you write it ➤ The CSS reloader watches CSS files and live updates them immediately ➤ You can develop the code and see the output at the same time ➤ The code is saved in file/browser as soon as you write it ➤ The code editor is draggable and resizable ➤ Use code editor in external window for developing responsive pages ➤ The code you write is auto-saved for the site ➤ You can use "TAB" key to indent your code ➤ Running Magic CSS again, while it is already loaded, disables the code ➤ Press "Esc" or click on close to hide it ➤ The code is added at the bottom of the tag ➤ It includes CSS/Less/Sass beautifier ➤ It includes CSS minifier ➤ It highlights the DOM elements matching the CSS selectors ➤ Use it along with Chrome/Edge/Firefox/Opera Developer tools ➤ You might find it useful in creating your custom themes for websites based on Stylish / Stylist ➤ This extension was previously known as "MagiCSS - Live CSS Editor" Security and privacy: ⓘ No permissions approval is required for installing the extension ⓘ For advanced features, like "Apply styles automatically", permissions are requested on-demand ⓘ Mixpanel is used to get anonymized stats for improving UX ⓘ Browser extension's storage, localStorage etc are utilized for the extension's core features. Visit https://webextensions.org/ for further details. Connect with us:
Amino: Live CSS Editor
Customize any website with your own CSS and see your changes instantly with Amino! Amino is a free CSS editor that lets you write and apply persistent CSS to any website. Use Amino to experiment with CSS in realtime, style your favorite websites, fix rendering issues—the applications are endless. Your CSS is stored in the cloud and is served every time you visit the page, making it effectively permanent as long as the extension is enabled. NEW FEATURE Guest mode: after many requests from users to be able to use amino without creating an account we've finally launched our Guest mode! It will work entirely locally with no need to create an account. If you want cloud storage you can simple create an account at anytime and enjoy the same great Amino experience sync'd across all your devices. Amino has previously been featured in: Chrome's ‘Top Picks’ in developer tool extensions, Smashing Magazine, Product Hunt, Designer News, Codrops, Sidebar, and more. FEATURES - Syntax highlighting - Automatic indenting and outdenting - Inspect tool - DevTools integration (*new*) - SCSS/Sass support - Autocomplete - Autosave - Data export - Multiple color schemes - Guest Mode USAGE TIERS - Guest & Free Cloud Tier - Free tiers are supported by ad displays in the sidebar/editor and cloud dashboard - Pro Cloud Tier - Remove ads - Access to collections - Unlimited Cloud Storage - Access to beta features BETA FEATURES (Pro Only) - AI Assistant to help write and understand your CSS rules For new feature announcements or just to say hello, please follow Amino on X: https://x.com/aminoeditor For more info or to sign up visit: https://amino.dev For frequently asked questions visit: https://amino.dev/faqs For documentation and guides on how to get the most out of Amino: https://docs.amino.dev For Amino's open source projects: https://github.com/aminoeditor By installing the extension or accessing the amino.dev website, you agree to Amino’s Privacy Policy (https://amino.dev/privacy) and Terms of Use (https://amino.dev/terms). TLDR: We care about user privacy, and we will never sell your data. To learn about the permissions this extension requests: https://amino.dev/permissions Thanks for giving Amino a try. If you like our product, please consider leaving us a review.
Extentie - extension manager
A simple and elegant Chrome extension manager allows you manage your extensions in a popup window. Extentie is a simple and beautiful tool that allows you to toggle and manage Chrome extensions in a popup. Latest update: - Now you can create your own groups to manage your extensions - Revamped from ground up, added more features
