Collider Fit

Collider Fit

Create fitted primitive colliders for your models in seconds.

Collider Fit is a Unity Editor tool designed to automatically generate and fit Box, Sphere, and Capsule Colliders around your GameObjects.

Instead of manually resizing collider centers and dimensions for every prop, character component, environmental object, or prefab, Collider Fit calculates the required collider bounds automatically.

It also supports batch processing, allowing multiple objects to be fitted at once.

Supported Collider Types

Collider Fit can automatically generate:

• Box Colliders
• Sphere Colliders
• Capsule Colliders

Capsule Colliders can be aligned along the:

• X Axis
• Y Axis
• Z Axis

Features

• Automatically fit Box Colliders
• Automatically fit Sphere Colliders
• Automatically fit Capsule Colliders
• X, Y, and Z capsule orientation
• Batch process multiple selected GameObjects
• Include child renderers when calculating bounds
• Optional inactive child support
• Mesh Renderer support
• Skinned Mesh Renderer support
• Per-axis collider padding
• Automatically configure collider center
• Trigger collider option
• Replace existing primitive colliders
• Live Scene View collider preview
• GameObject menu integration
• Undo and Redo support
• Scrollable and resizable Editor interface
• Clean custom Editor UI
• No third-party dependencies
• No runtime overhead

Batch Collider Creation

Need colliders on an entire collection of scene objects?

Select multiple GameObjects and Collider Fit can generate fitted colliders for all of them using the same configuration.

This is useful for:

• Environment props
• Imported asset packs
• Modular level pieces
• Furniture
• Rocks
• Containers
• Character components
• Destructible objects
• Prototype geometry
• Prefab libraries

Child Renderer Support

Collider Fit can calculate bounds using renderers located underneath the selected object.

This makes it useful for prefabs where visible geometry is spread across multiple child GameObjects.

Both Mesh Renderers and Skinned Mesh Renderers are supported.

Live Preview

Enable the Scene View preview to inspect the estimated collider before applying it.

Adjust padding, collider type, axis, and other options while previewing the resulting collider directly in your scene.

Simple Workflow

1. Select one or more GameObjects.
2. Open Collider Fit.
3. Choose Box, Sphere, or Capsule.
4. Adjust padding and fitting options.
5. Preview the result.
6. Apply the colliders.

Collider Fit is designed to turn repetitive collider setup into a fast Editor operation.

Compatibility

Designed for modern Unity versions, including Unity 6.

No additional packages or third-party dependencies are required.