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FlexBuilder 2023 (Flexbox/CSS-3 UI) – Dev Community

FlexBuilder 2023 (Flexbox/CSS-3 UI) – Dev Community

Tsunami 29 December, 2025
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User Rating 3 (1 vote)

Design UI 10x quicker and easier. Use fast CSS-3 / Flexbox (in-Game and in-Editor), with point/click editing tools + live previews. Build complex layouts in seconds! Seamlessly integrated with UnityUI

FlexBuilder 2023 (Flexbox/CSS-3 UI) v4.9.1 (Latest version)

VIP Only

“Sharing is caring”

Description

2024 version coming soon, price dropped to reflect that; upgrade discounts will be added when 2024 version is live —

Fully supported: Unity-2022, Unity-2021, Unity-2020, Unity-2019

Fully supported once LTS: Unity-2023 (partially supported while Unity-2023 still in beta)

* Fully integrated with UnityUI, giving the best of all worlds: performance, ease-of-use, seamless integration with Unity APIs

* Compare with UIToolkit and UnityUI: https://flexbuilder.ninja/features-comparison/

* Allows “Responsive Design”: smart layouts that change automatically across mobile, web, desktop

* Easy migration/upgrade path to UIToolkit in future (both are compatible with Flexbox)

* In-inspector preview + scene-view previews for live WYSIWYG UI editing

Support:

* 300 page manual with complete API docs: http://docs.flexbuilder.ninja/

* Online help/support via Discord – https://discord.com/invite/4AkrDgu

Bonus features:

* High-performance layout without having to re-write for UIToolkit

* FIXES Unity’s core-Text layout: always good, always correct, without thinking about it

* FIXES: Unity Scrollviews: makes them intelligently auto-resize to handle dynamic content

* A CSS rendering engine, but with the tools to edit and debug your UI directly inside the Editor

* Pre-integrated with: ScrollRect, Button, Text, Image, RawImage, InputField, Slider, etc

Technical details
Works in Unity versions:

2019
2020
2021
2022 – preferred/recommended
2023 (partial, until Unity releases 2023-LTS)

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