Edit HTTP request headers in Chrome. No ads, no tracking, no surprises. 100% free, no tracking.
No account required. Works instantly after install.
ModHeader used to be the standard. Then it started injecting ads and phoning home.
HeaderSnap does one thing: edit HTTP headers. That's it. No analytics embedded in the extension. No ads. No popups interrupting your workflow. Just a clean tool that does what it says.
If you've used ModHeader, HeaderSnap will feel familiar — with one difference: you can trust it.
Add, modify, or remove HTTP request headers for any URL. Set auth tokens, control caching headers, test API integrations — all without touching your server.
Create named header profiles and switch between them with one click. One profile for staging, one for production, one for your client's environment.
Already using ModHeader? Import your existing rules in one click. No manual re-entry, no starting from scratch.
No telemetry. No usage tracking. No external requests. HeaderSnap reads and modifies headers locally — nothing leaves your browser except the requests you're already making.
Apply header rules to exactly the URLs you want. Use wildcards for broad patterns or precise regex for surgical targeting. Rules only fire when and where you need them.
Export profiles as JSON and share across your team. Everyone on the same headers, every time. Free for everyone — no plan required.
One click. Your rules come with you.
Once installed, HeaderSnap inspects HTTP headers in seconds.
Open HeaderSnap → Import → select your ModHeader backup. All profiles transfer instantly.
Your rules are live. No re-entry, no rebuilding from memory.
HeaderSnap reads ModHeader's export format directly. Import takes 30 seconds.
Get Early Access →
No tiers. No feature gating. No trial period. Everything is free for everyone, forever.
ModHeader has ads. Requestly costs up to $23/member/month. HeaderSnap has neither.
If HeaderSnap saves you time, consider supporting development. Completely optional — the extension is free either way.
☕ Support on Ko-fi · ♥ GitHub Sponsors100% free. No account, no ads, no tracking, no upsells. Switch from ModHeader in under a minute.
Works on Chrome and Chromium-based browsers (Edge, Brave, Arc). Manifest V3 compliant.
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