HeaderSnap

About

HeaderSnap is a clean, privacy-first HTTP header editor for web developers, QA engineers, and API developers.

No ads. No tracking. No upsells. Just the tool you need.

─── WHAT YOU CAN DO ───

• Edit, add, and remove HTTP request and response headers
• Save named header profiles for each project or environment
• Switch profiles instantly — no manual re-entry
• Match headers to specific URLs using regex patterns
• Import your existing ModHeader rules in one click
• Export and share profiles with your team

─── WHO IT'S BUILT FOR ───

• Web developers testing auth headers, CORS configs, and API integrations
• QA engineers spoofing user agents, locales, and feature flags
• API developers debugging request/response cycles
• Anyone who relied on ModHeader

─── SWITCHING FROM MODHEADER? ───

HeaderSnap imports ModHeader rules directly. Open the import dialog, paste your existing config, and you're done. Same rules, cleaner tool.

─── FREE. ALWAYS. ───

HeaderSnap is 100% free — unlimited rules, unlimited profiles, no account required. All features available to every user.

The extension is 100% free with no monetization.

─── PRIVACY ───

HeaderSnap does not collect usage data, send analytics, or display ads. Ever. Your header configs stay on your machine.