SetHeader is a browser extension that lets you add, override, or remove HTTP request and response headers on network requests matching URL patterns you configure yourself, for local development and API testing purposes.
What data this extension handles: the header names, values, and URL patterns you enter are stored only in your browser's local extension storage (chrome.storage.local) on your own device.
What this extension does NOT do:
It does not transmit, sync, or upload any of your configuration or header data to any server.
It does not collect analytics, usage statistics, or any personal information.
It does not share data with any third party.
All data you enter stays on your device and is only ever used locally to modify your own outgoing browser requests as you've configured.
Contact: createapps360@gmail.comÂ
Last updated: July 2026