Custom Header

Overview

Easily add, manage, and inject custom HTTP headers into every browser request. A lightweight and elegant alternative to ModHeader.

Custom Header lets you add custom HTTP headers to every network request directly from your browser — perfect for developers, QA engineers, and API testers. Features: - Add unlimited custom request headers (key-value pairs) - Toggle individual headers on/off instantly - Master toggle to enable/disable all headers at once - Headers persist across browser sessions - Works on all network requests (XHR, fetch, images, scripts, etc.) - Clean, modern dark UI - Lightweight — no bloat, no tracking, no permissions beyond what's needed Use cases: - Add Authorization or API key headers for testing - Simulate custom client headers for debugging - Inject X-Forwarded-For or other proxy headers - Override Accept-Language or Content-Type headers Built with Manifest V3 and the declarativeNetRequest API for maximum performance and security.

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Details

Version
1.1.3
Updated
July 17, 2026
Flag concern
Offered by
AdityaWK
Size
48.29KiB
Languages
English
Developer
Email
aditya@selteer.net
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

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