tweak: mock and modify HTTP requests by tweak
tweak lets you mock and modify HTTP requests without leaving the browser
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About this extension
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
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
Rated 4.1 by 28 reviewers
Permissions and data
Required permissions:
- Access your data for all websites
Optional permissions:
- Access your data for all websites
More information
- Add-on Links
- Version
- 9.4.0
- Size
- 820.72 KB
- Last updated
- 3 days ago (Oct 8, 2026)
- Related Categories
- License
- All Rights Reserved
- Privacy Policy
- Read the privacy policy for this add-on
- End-User License Agreement
- Read the license agreement for this add-on
- Version History
- Add to collection