What is Your Digital Identity?
Every web request reveals information about you. Headerly helps you understand what data your browser sends and how it identifies you across the internet.
HTTP Request Headers
See the metadata sent with every web request—cookies, user agents, referrers, and more.
Network Details
Discover your IP address, location, and ISP information derived from your connection.
Browser Fingerprint
Learn how your browser, OS, and device configuration create a unique digital signature.
Digital fingerprint visualization
Privacy & Tracking Protection
Your privacy is paramount. Headerly processes everything server-side with zero tracking, ensuring your digital footprint remains yours alone.
No Data Storage
Your headers are analyzed in-memory and never persisted. What you see is visible only to you.
Server-Side Processing
All analysis happens server-side for maximum security and privacy protection.
Fully Transparent
Open-source code means you can verify exactly how your data is handled.
Open Source & Community
Transparency builds trust. Headerly is MIT licensed and welcomes contributions from developers worldwide.
Open source community
Fully Open Source
Inspect the source code on GitHub. No hidden tracking or proprietary algorithms.
Community Contributions
Report bugs, suggest features, or submit pull requests to improve Headerly.
Developer Community
Join a growing community of developers building privacy-first web tools.
Network Transparency
Know what network information is visible when you connect to the internet and how it's used.
Location Detection
Understand how your approximate location is determined from IP metadata.
Connection Metadata
See ISP details, network organizations, and other connection information.
Edge Computing Security
Learn how edge networks provide both performance and privacy benefits.
Environmental Impact
Digital activity has a real environmental cost. Understand the carbon footprint of websites and learn about green hosting.
Green Web Analysis
Check if websites run on renewable energy and estimate their carbon emissions.
Digital Carbon Footprint
Learn how internet usage contributes to climate change and what you can do about it.
Performance Optimization
Faster websites use less energy. Discover tools for building sustainable digital products.
Green energy impact