Coding⏱️ 2 min read📅 2026-06-02

How to Fix: Why are my CSS3 media queries not working on mobile devices?

Fix Why are my CSS3 media queries not working on mobil. Check if the viewport meta tag is set in. Step-by-step guide included.

Quick Answer: Check if the viewport meta tag is set in your HTML head, ensuring it matches the max-width value in your media query.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🛠️ Step-by-Step Verified Fixes
  3. 💡 Conclusion

To resolve the issue of CSS3 media queries not working on mobile devices, it's essential to understand that mobile browsers often have different rendering engines and user agent strings than desktop browsers. This can lead to discrepancies in how styles are applied.

🛑 Root Causes of the Error

  • Insufficient or incorrect CSS media queries
  • Mobile-specific browser rendering engine differences
  • User agent string not correctly identified in media queries

🛠️ Step-by-Step Verified Fixes

Method 1: Use Mobile-Friendly Media Queries

  1. Step 1: Replace `max-width` with `min-width` to ensure the media query applies to mobile devices.

Method 2: Use User Agent Strings

  1. Step 1: Add the `user-agent` directive to your media queries, targeting specific mobile user agent strings.

💡 Conclusion

By implementing these fixes, you should be able to resolve the issue and ensure your CSS3 media queries are applied correctly on mobile devices.

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