🔒Permissions-Policy Header Generator Documentation & Guide
Security & Privacy
📋How to Use Permissions-Policy Header Generator
- Select Baseline Preset: Choose a starting configuration such as Maximum Hardening (Zero Permissions), Standard PWA (Self), or E-Commerce Portal.
- Toggle Hardware & Sensor Permissions: Individually set access policies for camera, microphone, geolocation, screen-wake-lock, payment, USB, and motion sensors.
- Choose Export Format & Deploy: Export your custom policy as an HTTP response header, Nginx add_header, Apache .htaccess, HTML , or iframe allow attribute.
⚙️W3C Permissions-Policy Sandbox Specification
Permissions-Policy (formerly Feature-Policy) provides web architects with granular control over browser hardware APIs, sensors, and execution environments:
• Structured Field Values: Uses RFC 8941 Structured Headers syntax where features are formatted as feature=(origin-list) or feature=().
• Least Privilege Principle: Explicitly denying unused hardware interfaces (like WebUSB, Web Bluetooth, and Geolocation) eliminates whole classes of side-channel attacks.
• Iframe Sandboxing: Embedded third-party iframes cannot access sensitive sensors unless the parent frame explicitly delegates access via allow attributes.
• Clickjacking & Surveillance Mitigation: Disabling camera and microphone at the header level prevents rogue ads from capturing private audiovisual streams.
• Cross-Origin Isolation: Integrates seamlessly with COOP and COEP to establish robust client-side memory safety boundaries.
Enforcing Permissions-Policy creates hardware isolation between host pages and embedded third-party widgets.
💡Practical Permissions-Policy Use Cases
- Hardening enterprise web dashboards by disabling all unnecessary hardware APIs (USB, Bluetooth, Serial, Accelerometer).
- Securing embedded checkout iframes to permit payment APIs while strictly disallowing audiovisual hardware.
- Complying with modern security audit frameworks (SOC 2, ISO 27001, Mozilla Observatory) requiring explicit feature restrictions.
100% Client-Side Privacy Guarantee:All calculations, text manipulation, cryptographic hashing, and media conversions execute exclusively within your local browser sandbox. Zero user inputs, financial amounts, credentials, or proprietary files are ever transmitted across networks or logged on external servers.
