tweak alternatives and comparisons

tweak is a browser extension for Chrome, Edge and Firefox that mocks, modifies, redirects and blocks HTTP requests, and edits request and response headers, without code. It is not the right tool for every job, and neither is anything else on this page.

Each comparison below says where tweak fits, where the other tool is the better choice, and how to move over if you switch. They are written by the tweak team, so read them with that in mind.

The shortlist​

Looking for a browser extension to mock API responses and want the options side by side? The best Chrome extensions to mock API responses ranks them, tweak included, by what each one does well.

tweak vs Requestly​

Both are browser extensions that intercept and change requests. Requestly adds a desktop app and team workspaces; tweak needs no account and stays focused on the browser. tweak vs Requestly compares them scenario by scenario, and Requestly alternatives looks at the wider field.

tweak vs Proxyman​

A browser extension against a desktop proxy. Proxyman sees traffic from every app on your machine, mobile devices included, and asks for a proxy and a certificate in return. tweak sees what your web page sends, with nothing to configure. tweak vs Proxyman helps you pick, and Edit HTTP Requests Before Sending compares request breakpoints across proxies, prices included.

tweak vs Mock Service Worker​

Mock Service Worker (MSW) mocks APIs from inside your code, a browser extension from outside it. MSW is the better fit for automated tests and mocks versioned with the app; an extension wins for a quick check on staging or production. Mock Service Worker vs a browser extension covers where each one fits, and how to use both.

ModHeader​

ModHeader was pulled from the Chrome Web Store and Edge Add-ons in July 2026. Goodbye ModHeader, hello tweak is the migration guide: what happened, and how ModHeader's headers and profiles map to tweak's free header rules and collections. ModHeader alternatives compares the replacements.

Resource Override​

Resource Override swapped the files a site loads for your own, and it is no longer maintained. Resource Override alternative shows how tweak's free redirect rule sends scripts, stylesheets, API calls and pages to localhost or another url instead.

Simple Modify Headers​

Simple Modify Headers adds, changes and removes request headers. Simple Modify Headers alternative maps it onto tweak's free header rules: a url per rule, regex, Set, Append and Remove, on request and response headers.

Try tweak​

Mock, header, redirect and block rules are free, with no account. Start with the introduction, or compare the plans.