🛡️ No ads · No tracking · Open source

The safe, open-source
ModHeader alternative

Add, modify, or remove HTTP request & response headers in Chrome. Built for developers who want a clean tool — not ads, bloat, or hidden trackers.

Add to Chrome — Free View source on GitHub
✓ OpenHeader never reads or transmits your traffic. Minimal permissions.

Everything you need. Nothing you don't.

The core header editing is free, forever.

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Request & response headers

Set, add, or remove headers on any request or response.

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Profiles

Switch between header sets in one click for different environments.

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Per-URL filters

Apply headers only to the sites or APIs you choose.

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Import / export

Back up or move your setup. Easy migration from other tools.

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Fast & lightweight

Built on Chrome's native rule engine. No account needed to start.

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Open source

Audit every line. No black boxes, no surprises.

Why OpenHeader?

After a popular header editor was pulled for bundling a hidden tracking SDK, developers deserve a tool they can trust.

No ads, ever
No injected ads, no upsell spam in your workflow.
No tracking
No analytics, no trackers, no advertising SDKs.
Minimal permissions
Header changes go through Chrome's official declarativeNetRequest engine. The extension never inspects your traffic.
Open source
The full code is public so anyone can verify what it does.

Privacy Policy

OpenHeader does not collect, store, or transmit any personal data or browsing activity.

  • OpenHeader does not read the content of your web traffic.
  • Header modifications are applied via Chrome's official declarativeNetRequest API. The extension does not intercept or inspect network requests.
  • Your header configurations are stored locally in your browser (chrome.storage.local) and are never sent to us or any third party.
  • We use no analytics, no trackers, and no advertising SDKs.
  • If optional Pro sync is added in the future, only the header profiles you explicitly choose to sync will be stored, and it will be clearly opt-in.

Questions? Contact: smartfabai@gmail.com

Add OpenHeader to Chrome

Free. Open source. No account required.

Add to Chrome

Coming to the Chrome Web Store. Star the repo to get notified.