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tweak: mock and modify HTTP requests

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Overview

Mock or modify your HTTP requests to test, develop and demo your web application

tl;dr tweak lets you mock and modify HTTP requests without leaving the browser Mock 🆓 ﹥ Mock response data, headers, status code and delay ﹥ Match requests by their JSON or form (x-www-form-urlencoded) body ﹥ Capture requests in the background and turn them into rules ﹥ Document your rules with markdown labels and notes ﹥ Export and import rules to share them with your team Modify headers 🆓 ﹥ Add, override, append or remove request and response headers ﹥ Apply them on every tab, or only on the tab you're testing ﹥ Works on every request: pages, scripts, images and API calls ﹥ Dynamic header values with templating Redirect 🆓 ﹥ Send requests to another url, such as API calls to localhost ﹥ Replace documents such as HTML/CSS/Images Premium 💸 ﹥ Modify live server responses and request payloads ﹥ Write custom JavaScript to change requests and responses ﹥ Organize your workspace with collections ﹥ Variables and environments: switch between dev, staging and prod in one click ﹥ Create mock data with random generators ﹥ Debug requests with breakpoints and logpoints ﹥ Narrow redirects to specific request types Useful links 🔗 ﹥Getting started https://tweak-extension.com/docs/intro ﹥FAQs https://tweak-extension.com/faqs ﹥Changelog https://tweak-extension.com/changelog ﹥Support help@tweak-extension.com

Details

  • Version
    9.3.1
  • Updated
    October 4, 2026
  • Features
    Offers in-app purchases
  • Size
    768KiB
  • Languages
    English
  • Developer
    Website
    Email
    help@tweak-extension.com
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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tweak: mock and modify HTTP requests has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

tweak: mock and modify HTTP requests handles the following:

Location
User activity

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, please open this page on your desktop browser

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