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Zsolt Oroszlány
Founder & Chief Creative Officer of Playful Sparkle since 2004, combining business leadership, digital strategy, design, and software engineering to help organizations build effective digital solutions. Regularly publishes insights on web development, SEO, design, and emerging technologies.
JSON-LD: A Comprehensive Guide to Structured Data for the Semantic Web
JSON-LD structured data guide: Google's recommended format, implementation examples, schema types, validation, and best practices for 2026 SEO and AI search.
A Comprehensive Guide to Metadata: Open Graph, X Cards, and Dublin Core
Metadata guide 2026: Open Graph (40% higher engagement), X Cards (only twitter:card required), Dublin Core (15 elements, ISO 15836). Implementation and best practices.
Best Ecommerce CMS for Your Online Store in 2026
Best ecommerce CMS for 2026: Shopify vs WooCommerce vs Magento vs BigCommerce. Market share, pricing, AI features, and platform selection guide.
Caching in Web Performance Optimization: Strategies and Benefits
Web caching guide for 2026: HTTP/3 (40% CDN traffic), multi‑tier caching, microcaching, stale-while-revalidate, and Apache/Nginx configuration best practices.
How to Choose the Best Image File Format for Your Website
Image format guide 2026: AVIF (50% smaller than JPEG), WebP (97%+ browser support), SVG for logos, responsive images, and lazy loading best practices.
Social Media Sharing Widgets and Their GDPR Implications
Social media sharing widgets and GDPR: consent requirements, joint controllership liability, and manual implementation guide for compliant sharing buttons without third‑party scripts.
Top 7 Tips for Boosting Landing Page Conversions
Landing page conversion guide 2026: single CTA (13.5% vs 10.5%), INP (200ms), personalised CTAs (+202%), testimonials (+22% lift). Industry benchmarks included.
Page Speed Optimization: The 2026 Guide to Faster Websites
Page speed optimization guide 2026: INP replaced FID (200ms), Core Web Vitals thresholds (LCP 2.5s, CLS 0.1), AVIF images, HTTP/3, and practical optimization techniques.
The Complete Guide to Web Accessibility for 2026
Web accessibility guide 2026: WCAG 2.2, European Accessibility Act (EAA), Slovak Act No. 351/2022 Coll. (€30k fines), native HTML, ARIA, and screen readers.
Comprehensive guide to color theory
Color theory guide 2026: OKLCH color space, WCAG 2.2 contrast requirements (4.5:1/3:1), European Accessibility Act, Slovak Act No. 351/2022 Coll.
Evaluating the advantages and costs of website redesign
Complete guide to website redesign in 2026: strategic framework, cost considerations, ROI expectations, conversion improvements, European Accessibility Act (EAA) compliance, and Slovak legal requirements.
How Often Should You Redesign Your Website?
Website redesign guide 2026: how often to redesign (2–3 years), signs it's time, Core Web Vitals, SEO preservation, and growth‑driven design.
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