DataToolkit
Free developer tools for encryption, network diagnostics, text processing, and data conversion.
Popular Tools
Markdown Editor
Live preview editor with Word/HTML/RTF conversion
Cryptography Tools
Hash with MD5, SHA-1, SHA-256, and SHA-512
Network Utilities
IP lookup, WHOIS, reverse DNS, and more
Password Generator
Create strong, secure passwords instantly
UUID Generator
Generate unique identifiers (v4, v7)
Base64 Encoder
Encode and decode Base64 strings
Data Collections
Mobile networks, profanities, service ports
Text Utilities
Character counter, slugify, and more
QR Code Generator
Custom codes with your own logo
Barcode Generator
Create Code 128, EAN, UPC, and more
Cron Expression
Build, test, and schedule cron jobs
Learn
View all →How Passwords Are Hashed
Why SHA-256 alone is not enough — bcrypt, salting, and Argon2 explained.
NetworkingWhat is a Subnet Mask?
CIDR notation, network vs host bits, and common subnet sizes.
SchedulingWhat is a Cron Expression?
Five-field syntax explained field by field with real-world examples.
Open Data Repository
Access raw datasets including mobile networks, profanity lists, service ports, and more on GitHub.
Visit GitHub Repository