Blog

Tips, tutorials, and best practices

TutorialJune 8, 2026

Password, QR Code & Hash Generators: A Practical Guide

How to use WaiHub's password generator, QR code generator, and MD5/SHA hash tool — all in your browser.

TutorialJune 1, 2026

Regex for URL Validation

Validate URLs with regex — HTTP/HTTPS patterns, query strings, and when regex is enough vs when to use URL parsers.

TutorialMay 31, 2026

Developer Toolkit: URL, Timestamps, UUID & JWT

How to use WaiHub's URL encoder, Unix timestamp converter, UUID generator, and JWT decoder.

TutorialMay 30, 2026

Regex for Email Validation

How to validate email addresses with regex, common patterns, limitations, and best practices.

TechnicalMay 29, 2026

Hash Algorithms Comparison Guide

Overview of MD5, SHA-1, SHA-256, and SHA-512 — speed, security, and appropriate use cases.

SecurityMay 28, 2026

Secure Password Generation Guide

How to generate strong passwords, length recommendations, and why crypto-random beats memorable passwords.

SecurityMay 27, 2026

JWT Security Best Practices

Key techniques and common pitfalls for secure JWT implementations.

TutorialMay 26, 2026

JSON Best Practices for APIs

Design conventions for JSON APIs — naming, nesting, null handling, and error response formats.

TutorialMay 25, 2026

API Debugging Tips for Developers

Practical techniques for debugging REST APIs — JSON inspection, JWT analysis, and common error patterns.

TechnicalMay 24, 2026

How QR Codes Work

The technology behind QR codes, encoding capacity, error correction, and practical use cases.

TutorialMay 23, 2026

Common Regex Examples for Developers

Practical regular expression patterns for email, URL, phone numbers, dates, and data validation.

TutorialMay 22, 2026

How to Use a JSON Formatter Effectively

Best practices for formatting JSON and debugging APIs faster.

SecurityMay 21, 2026

MD5 vs SHA-256: Hash Algorithm Comparison

Compare MD5 and SHA-256 for checksums, integrity verification, and when each hash algorithm is appropriate.

TechnicalMay 20, 2026

Understanding Unix Timestamps

What Unix epoch time is, seconds vs milliseconds, and how to convert timestamps for logs and APIs.

TechnicalMay 19, 2026

URL Encoding Explained

Learn percent-encoding, encodeURIComponent vs encodeURI, and how to handle special characters in URLs.

TechnicalMay 18, 2026

UUID v4 Explained

What UUID v4 is, how random UUIDs work, and when to use them for IDs in databases and distributed systems.

SecurityMay 17, 2026

How JWT Authentication Works

Understand JWT structure, signing, and verification — the foundation of modern API and OAuth authentication.

TechnicalMay 16, 2026

JSON vs XML: Which Should You Use?

Compare JSON and XML for APIs, configuration, and data exchange — strengths, weaknesses, and when to choose each.

TechnicalMay 15, 2026

What is JSON? A Beginner's Guide

Learn what JSON is, how it works, and why it became the standard format for web APIs and configuration files.

TechnicalApril 20, 2026

Base64 Encoding Explained

How Base64 works, where it's used, and common misconceptions.