NoobHeaders

Simple, local-first HTTP header modifier for developers and noobs. No ads, no tracking.

NoobHeaders adds, overrides or removes HTTP request and response headers in a few clicks. Simple enough for beginners, quick for developers, and everything stays on your device. WHAT YOU CAN DO • Add, override or remove request and response headers: Authorization, User-Agent, Cookie, CORS headers or your own X- headers. Leave the value empty to remove a header. • Organize your headers in profiles: one per environment, project or test. • Switch several profiles on at the same time. When two of them set the same header, the selected profile wins, then the lowest one in the list. • Reorder profiles by drag and drop, with the arrow buttons or with Alt + ↑/↓. • Apply a profile only on some sites with filters: – a domain: example.com also covers its subdomains; – a URL pattern, with * as the wildcard: *://localhost:3000/api/* • See at a glance which profiles apply to the current tab. The icon badge shows the number of active headers. • Switch all modifications on or off with Alt+Shift+H, without opening the popup. • Get suggestions for common header names, switch each header or filter on or off, duplicate, delete and undo. • Search your profiles, export one or all of them to JSON and import them back (add them or replace yours). FOR WHOM • Web developers testing an API, a CORS setup or a feature flag • QA testers switching between environments • Anyone who needs to send a specific header without writing code PRIVATE BY DESIGN • No account, no ads, no analytics, no tracking. • Your profiles are stored locally in your browser and never sent anywhere. • Headers are changed locally by your browser: NoobHeaders does not read or store the content of the pages you visit. OPEN SOURCE NoobHeaders is free and open source (MIT license). Code, issues and suggestions: https://github.com/BioSs54/noobheaders Available in English, French, German, Spanish, Italian, Brazilian Portuguese, Russian, Simplified Chinese, Japanese and Korean. Also available for Firefox. GOOD TO KNOW Filters are not regular expressions: write *://example.com/api/* rather than .*://example\.com/api/.* (the popup warns you if a filter looks like a regular expression).