Wiki

Common Tool Terms Explained

Short explanations for formats, protocols, and concepts that appear across the tool pages. Understand the term, then continue the task.

Security

What Are TOTP and 2FA? 2FA means two-factor authentication, and TOTP is one of the most common ways to generate verification codes. The 6-digit code in an authenticator app is usually calculated from a Secret and the current time.

Developer

What Is JSON? JSON is a lightweight data format commonly used for API responses, config files, and frontend-backend data exchange. It is built from objects, arrays, strings, numbers, booleans, and null. What Is Base64? Base64 is an encoding that represents binary data as printable text. It is common in APIs, embedded images, email attachments, and token fragments. What Is WebSocket? WebSocket is a protocol for realtime two-way communication between a browser and a server. It is common in chat, notifications, market data, collaboration, and live logs.

Network

What Are CIDR and Subnet Masks? CIDR uses notation such as `192.168.1.0/24` to represent an IP range. The number after the slash is the network prefix length.

Image

What Is EXIF? EXIF is metadata commonly stored in photos and images. It may include camera model, capture time, orientation, exposure settings, and sometimes location data.