Guides, Tutorials & Developer Articles
Learn more about frontend development, online tools, JSON, encoding, regex, CSS and productivity workflows.
Unix Time vs ISO 8601
Unix time and ISO 8601 are two common ways to represent dates and times in software. Learn how they work, how they differ, and when to use each format.
Read article →Unix Timestamp Explained
Understand Unix timestamps and how developers use them to represent time.
Read article →UNPKG Explained
Understand how UNPKG serves npm packages through a CDN, how its URLs work, how to select versions and files, and when to use it in web projects.
Read article →URL Encoding Explained
Understand how URL encoding works and why it is essential for web development.
Read article →User-Agent Strings Explained
Understand how User-Agent strings work and how they are used across the web.
Read article →Using QR Codes for Email
Understand how email QR codes work, how mailto links are encoded, what information they can contain and how to use them effectively.
Read article →Using QR Codes for SMS
Understand how SMS QR codes work, how to create them, what data they contain, common use cases and best practices for mobile messaging.
Read article →UTC vs GMT
Understand the differences between UTC and GMT, their relationship to time zones, and why UTC is the preferred standard for modern software and distributed systems.
Read article →UTF-8 vs UTF-16 vs UTF-32
Discover the differences between the three most common Unicode encodings, including storage size, compatibility and practical use cases.
Read article →UTM Parameters Explained for Beginners
A beginner-friendly guide to understanding UTM parameters and campaign tracking.
Read article →UUID Versions Explained
Understand the differences between UUID versions, how UUID v1, v3, v4, v5 and v7 are generated, and when to use each version.
Read article →UUID vs Nano ID
Compare UUID and Nano ID by length, randomness, security, performance, database usage and practical use cases.
Read article →UUID vs ULID
Compare UUID and ULID by format, length, time ordering, randomness, database usage, performance and practical use cases.
Read article →WCAG Color Contrast Guide
Understand WCAG contrast ratios, accessibility requirements and practical techniques for creating readable and inclusive user interfaces.
Read article →WCAG Guidelines for Developers
Understand WCAG principles and practical accessibility requirements for building websites that are usable with keyboards, screen readers and assistive technologies.
Read article →Web Accessibility Explained
Understand web accessibility, WCAG principles, accessible HTML, keyboard navigation, color contrast, forms, images and common accessibility practices.
Read article →WebP vs PNG vs JPEG vs AVIF
Learn the differences between WebP, PNG, JPEG and AVIF, compare compression, quality and browser support, and discover when each image format should be used.
Read article →What Is .editorconfig?
Understand how .editorconfig standardizes coding styles across different editors and IDEs, learn its most useful properties and see practical configuration examples.
Read article →What Is .htaccess?
Understand how .htaccess works and why it remains an important Apache configuration tool.
Read article →What Is a 301 Redirect?
Understand how 301 redirects work, when to use permanent redirects, how they affect SEO and how to avoid common redirect problems.
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