Best LT Debug Alternatives in 2026

About LT Debug

The best Chrome extension to debug web issues and accelerate your development 🔥🚀 LT Debug is a collection of free online web design, development, and debugging utilities enhanced with LambdaTest’s digital experience testing cloud to make your development efforts easier and faster. ⏺Replay on TestMu AI Cloud: Record user flow with Chrome Recorder panel (DevTools > More tools > Recorder), and replay or retest it as an automated test on 3000+ browser-os-resolution combinations on TestMu AI Cloud. 🚀Real Time Test: Directly launch live interactive real-time tests of your web apps or mobile pages, and test across 3000+ desktop and mobile browsers running on real devices. 🖼Screenshot Test: Initiate a screenshot test on TestMu AI Cloud. Take screenshots on up to 25 desktop or mobile browsers, resolution, and your preferred real or virtual devices. Access free useful utilities like Add/Remove/Modify HTTP(s) Header Requests, Block URL requests, Add/Remove Query Param, Throttle the Page Response, Inject Scripts, Change User Agent, Redirect URLs, and many more..!! 🔥 Best free tool you can ask to debug and ship web-based products faster! 🔥 📄 Modify Header - Add, modify, or remove an HTTP request header on a desired website or URL. It helps you test a particular header for a request on a website. 🚦 Block Requests - Blocks HTTP Requests based on your specified URL specific conditions. 📶 Throttler - Throttle network speed for all network requests. Choose any URL to slow down, leaving others at normal speed. Control delay (in milliseconds) for desired URL. ⚙️ Add/Remove Query Param - Change, and manipulate URL query parameters. It reads and organizes the key, and value pairs on the current web page. 🔀 Redirect Requests - Specify a page that should be automatically redirected to another page. E.g. you want http://lambdatest.com/111 to redirect to http://lambdatest.com/222. 🕵 Change user Agent - Switch between user-agent strings quickly. Imitate, spoof or simulate other browsers, devices or search engine spiders. 💉 Insert script css/js - Simulate any web page's experience by injecting your own JavaScript or CSS script in console. 🟢 Allow CORS - Add (Access-Control-Allow-Origin: *) rule to the response header and easily perform cross-domain Ajax requests in web applications. 🛡️ Content Security Policy - Generate Content Security Policy headers on any website/web page of your choice 🎇Bonus🎇: Access 160+ free tools with a click of a button to help you with Tidying up code, Data Formatting, Random Data Generation, Hash Calculations, and Utilities