DataToolkit

Free developer tools for encryption, network diagnostics, text processing, and data conversion.

Popular Tools

Editors

JSON, XML, YAML, Markdown, and text editors with syntax highlighting

Cryptography

Hash with MD5, SHA-1, SHA-256, and SHA-512

Network Tools

IP lookup, WHOIS, reverse DNS, ping, and subnet calculator

Generators

UUID, secure passwords, QR codes, and barcodes

Utilities

Base64, URL encoder, case converter, cron builder, and regex tester

Data Collections

Mobile networks, profanity lists, and service ports

Reference

ASCII table, HTML entities, emoji picker, and regex cheat sheet

Convert

Convert Word, HTML, and RTF documents to Markdown

Learn

View all →

Guides

What Is Unix Time?

Why Unix time counts seconds from 1 January 1970, how it avoids timezone bugs, seconds vs milliseconds, and the Year 2038 problem.

Networking

How Does WHOIS Work?

A plain-English guide to WHOIS lookups — how domain and IP registration records work, what information they reveal, why most registrant details are now redacted, and how to run one yourself.

Cryptography

How Does HTTPS Work? TLS and SSL Explained

HTTPS encrypts traffic between your browser and a server using TLS. Learn how the TLS handshake works, what certificates do, how symmetric and asymmetric encryption are combined, and what the padlock really means.

Open Data Repository

Access raw datasets including mobile networks, profanity lists, service ports, and more on GitHub.

Visit GitHub Repository