Redirectly

Redirectly is a lightweight alternative to Requestly and Switcheroo, designed for fast URL redirection and JS injection.
Redirectly is the ultimate developer tool for manipulating web resources and runtime behavior on-the-fly. Like popular tools such as Requestly, Redirectly allows you to redirect any resource request (JavaScript, CSS, images, API calls, fonts, etc.) to a local file or a different URL.

Core Features for Development & Debugging
Resource Redirection: Instantly replace live files with your local versions (e.g., swap production.js for your debug version dev-fix.js) to test fixes or feature branches without modifying the server.

API Mocking: Redirect specific API endpoints to local JSON files or mock servers for reliable frontend development in isolation.

Advanced Feature: Reliable Code Injection
Runtime JS Injection: Insert custom JavaScript code directly into the page's runtime environment for high-utility debugging.

Guaranteed Execution: Code runs in the browser's secure Isolated World , ensuring execution on modern, secure websites (like Google and YouTube) without failing due to security policies (CSP or Trusted Types).

DOM Manipulation: Use custom scripts to alter the DOM structure, modify element attributes, or observe changes as the site loads.

Redirectly is the perfect solution for comprehensive frontend testing, deep debugging, and enhancing any complex development workflow where granular control over live site resources and reliable code execution is essential.