Net Tinker Privacy Policy

Last updated: 7 August 2026

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Net Tinker is a Chrome extension for developers. It intercepts and modifies network requests (mock responses, redirects, headers, delays, and so on) directly in the browser, for development and testing purposes.

Summary

Net Tinker does not collect, transmit or sell any data to external servers. Everything the extension stores stays in your own browser.

What is stored, and where

• The rules and groups you create (URL patterns, mock responses, headers, descriptions, tags): stored locally through the browser's chrome.storage.local API. They never leave your machine.
• The capture log: only produced in the tab where you manually turn on "Record this tab". It keeps basic metadata (URL, method, status code, timestamp) locally, capped at the last 200 entries, and you can clear it at any time with the "Clear" button. No other tab is captured.
• Extension preferences (enabled/disabled, which tab is being recorded): also local, via chrome.storage.local.

The DevTools panel

Net Tinker adds a panel to Chrome DevTools that lists the network requests of the page you are inspecting. Those captures exist only in memory while DevTools is open and are never written to storage. A response body is only ever read when you explicitly press "Mock", and even then it is saved solely as part of the rule you chose to create.

What we do not do

• We run no servers of our own and send no data to third parties.
• We use no analytics, advertising or tracking of any kind.
• We neither sell nor share information with anyone.
• We do not access your browsing content beyond what is needed to apply the rules you configure yourself.

Why it asks for access to all sites

Net Tinker needs broad host permission (<all_urls>) because its purpose is to intercept network requests on whichever page you decide to create a rule for — there is no way to know in advance which domain that will be. That access is used exclusively to run, in your own browser, the logic of the rules you configure. It is not used to read, collect or send your browsing activity anywhere.

Changes to this policy

If this policy changes, the date above will be updated along with the corresponding content, in the same location.

Contact

For any question about this extension's privacy, please use the support channel listed on the Net Tinker page in the Chrome Web Store.