Packet.guru offers a comprehensive suite of free online network tools and utilities designed for developers and system administrators, also including deep mail security audits (SPF/DKIM/DMARC), JWT decoding, with a "terminal-modern" aesthetic. The core feature is the Privacy & Trust Index — a comprehensive audit that calculates a score (0-100) based on different parameters:

- Regional & Time Integrity.

- Device Integrity.

- Network Transparency.

- Browser Fingerprinting.

etc.