Best Alternatives to Sider Code in 2025
Sider Code is a Chrome extension feature that lets you modify any website's appearance or behavior using plain-language commands. It interprets your request, writes the necessary code, and applies the change instantly. While innovative, it may not suit everyone—especially those needing more control, cross-browser support, or advanced automation. Below are the best alternatives to Sider Code, ranging from browser extensions to full-featured web development tools.
Tampermonkey
A popular userscript manager that lets you inject custom JavaScript and CSS into any site. It offers granular control, a large script library, and works across Chrome, Firefox, Safari, and Edge—unlike Sider Code's Chrome-only focus.
Stylus
If your primary need is visual reshaping, Stylus is a lightweight extension that applies custom CSS themes to websites. It supports per-site styles, cloud sync, and a community repository, making it simpler and more reliable for design tweaks.
uBlock Origin
For users who want to reshape sites by removing unwanted elements (ads, popups, trackers), uBlock Origin is a powerful, open-source content blocker. It uses filter lists and custom rules to clean up pages without writing code.
Playwright
A robust automation framework for developers who need to programmatically reshape or test websites. It supports scripting in multiple languages, cross-browser testing, and can handle complex interactions—far beyond Sider Code's simple instruction-based approach.
Puppeteer
Similar to Playwright but Node.js-focused, Puppeteer lets you control Chrome via API. Ideal for developers who want to build custom site modifications, scrape data, or generate screenshots with full control over the browser environment.
Katalon Studio
A comprehensive test automation tool that can also be used to modify web elements during test runs. It offers a record-and-playback interface, making it accessible for non-coders who need to reshape sites for QA or personal use.
Custom CSS via DevTools
For quick, one-off changes without installing anything, Chrome's built-in DevTools lets you edit CSS and JavaScript live. You can save changes with tools like 'Live Editor' extensions, but it's best for temporary tweaks rather than persistent reshaping.
Sider Code stands out for its natural-language interface, making website modification accessible to non-programmers. However, alternatives like Tampermonkey and Stylus offer more control and cross-browser support, while Playwright and Puppeteer provide advanced automation for developers. Choose based on your technical comfort and whether you need persistent, shareable, or testable modifications.