What Umbraco 15.4.0 Means for Your Site.

Released May 1, 2025 • Minor Release

Improved Dropzone Component

• Brand‑new, sleeker file uploader in Image Cropper & Upload Field
• Single‑file mode now truly enforces one‑at‑a‑time uploads
• Better preview for images/SVGs - no more guessing what you’ve selected

Validation Feedback on Save

• Instant, inline error messages when required fields are missing
• Clear “what went wrong” prompts keep authors moving forward

Enhanced References Handling

• Cleaner display of content, media & member links
• Stronger warnings when you delete an item that’s in use
• Safer workflows - fewer “oops, I broke the page” moments

Performance Optimizations

• Reduced memory allocations for parsing routines
• Fewer heap allocations & dictionary operations in hot code paths
• Faster back‑office load times across the board

Dependencies Upgraded

• @umbraco-ui/uui bumped to 1.13.0 for more flexible styling
• Examine library updated to its latest patch for search stability

Accessibility Tweaks

• Error text colour is now fully customizable
• Better ARIA labels across form controls

• Ready for a glitch‑free back‑office? Head over to the Umbraco 15.4 release notes and schedule your upgrade today!
• Schedule your upgrade this week to reap immediate benefits