Supported by the following organizations
This is to certify that Christian Muller successfully completed and received a passing grade in HTML5.1x: HTML5 Coding Essentials and Best Practices a course of study offered by W3Cx, an online learning initiative of World Wide Web Consortium.
Noted by
Michel Buffa
Professor of Computer Science University Côte d’Azur
Marie-Claire Forgue
Head of Training The World Wide Web Consortium (W3C)
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- Verified Certificate Issued February 14, 2026
- Valid Certificate ID 4d31383a88ff4a0aaaaebc9b3093d66c