Header Override

Header Override is an open-source extension that lets you modify HTTP request and response headers, cookies, and local profiles. It is built for API debugging, letting you change headers in-browser without touching server code. Key features: - Modify request and response headers and cookies. - Apply rules only to URLs you choose. - Organize rules into reusable profiles. - Turn individual rules or all rules on and off. - Import and export profiles. Header Override is a simple, easy-to-use extension available in Chrome, Firefox, and Edge browsers.