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Header Editor — HTTP Request Header Manager

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Overview

Add custom HTTP request headers to any site. Inject Authorization tokens, CORS headers, or... | Not affiliated with Anthropic, PBC.

HeaderEditor lets you create rules to inject, modify, or remove HTTP request headers for specific URL patterns — without a proxy server or writing code. Set Authorization headers for API testing, spoof User-Agent strings for compatibility testing, add CORS headers for local development, or block tracking headers. **Key Features:** - Rule-based header injection using URL patterns (glob and regex) - Inject, modify, or remove request headers - Pre-built templates: Authorization Bearer, User-Agent presets (mobile/desktop/bot) - Rules toggle on/off individually or all at once - Import/export rules as JSON for team sharing - Works with fetch, XHR, and any browser request - No proxy setup required — works at the browser extension level **Who is it for?** Backend developers testing APIs that require auth headers, frontend developers working around CORS in local development, QA engineers testing responsive behavior with User-Agent spoofing, and security researchers studying header-based access control. **Privacy & Trust:** All rules are stored locally in your browser. No header data, URLs, or rule configurations are sent to external servers. Anonymous analytics via Google Analytics 4 only. Install HeaderEditor — debug faster without leaving Chrome.

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Details

  • Version
    0.1.2
  • Updated
    May 19, 2026
  • Offered by
    shota.katougi
  • Size
    22.16KiB
  • Languages
    2 languages
  • Developer
    Email
    shota.katougi@gmail.com
  • 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

Manage extensions and learn how they're being used in your organization
The developer has disclosed that it will not collect or use your data.

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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