olson.at

🔧 Security & Network Tools

Browser-based utilities for cybersecurity and network administration. All processing happens locally—no data sent to servers.

🔐

JWT Decoder

Decode and verify JSON Web Tokens. View header, payload, and signature.

Security
🌐

Subnet Calculator

Calculate CIDR ranges, network addresses, broadcast, and usable hosts.

Networking
🔑

Password Generator

Generate secure passwords with entropy calculation and memorable phrases.

Security
📜

SSL/TLS Checker

Check SSL certificate details, expiration, and chain validation.

Security
🔍

DNS Lookup

Query DNS records for any domain. A, AAAA, MX, TXT, NS, CNAME, and SOA.

Networking
🖼️

Image Toolkit

Steganography detection, metadata extraction, and image analysis toolkit.

Forensics
📋

String Extractor

Extract readable strings from binary files. Filter by length and encoding.

Forensics