Free 360 Equirectangular to Cubemap Face Extractor—
gemini-3.0-flash
Convert 360-degree equirectangular images into 6 separate cubemap faces with our free, browser-based tool. Process photos locally without server uploads.
AI Generation Prompt
Technical Specification: 360 Equirectangular to Cubemap Face Extractor
Overview
A high-performance, single-file browser utility that converts 360-degree equirectangular images into standard 6-face cubemaps. The application processes images entirely on the client side using Canvas API pixel manipulation.
Core Features
- Drag-and-Drop Interface: Instant file loading for high-resolution equirectangular images.
- Precision Mapping: Mathematical projection of spherical coordinates to 6-face square textures (Front, Back, Left, Right, Top, Bottom).
- Real-Time Preview: An interactive preview area displaying the extracted faces.
- Batch Export: Option to download specific faces or all faces as a single ZIP file using a lightweight compression library (e.g.,
jszip). - Resolution Scaling: Options to define output face size (e.g., 512px, 1024px, 2048px).
UI Layout
- Header: Clean, minimalist title and brief instructional text.
- Main Tool Area (Split View):
- Left Pane: Upload zone and processing controls (Resolution selector, format selection).
- Right Pane: Preview grid displaying the 6 extracted faces.
- Action Bar: Persistent buttons for 'Process Image', 'Download Selected', and 'Download All' positioned at the bottom of the tool area.
Design System & Aesthetics
- Theme: Light-mode exclusively. Use
#fffffffor backgrounds,#f8fafcfor card backgrounds, and#2563eb(Royal Blue) for primary actions. - Typography: Inter or System-sans-serif, clean, high-legibility.
- Transitions: Smooth easing (200ms
ease-in-out) on button hover states and image loading phases. - Shadows: Subtle
0 4px 6px -1px rgba(0, 0, 0, 0.1)for card depth.
Technical Constraints & Directives
- Single File: All HTML, CSS, and JS must reside in one file. Use CDNs for essential scripts (e.g.,
jszip,file-saver). - No Persistence: Do not use
localStorageorindexedDB. Keep state insideconst appState = {}. - Sandbox Safety: Avoid
alert(),confirm(), orprompt(). Create custom modals using standard DOM elements with absolute positioning and highz-index. - Performance: Use Web Workers if processing large images (8K+) to prevent UI blocking.
- Responsiveness: Use CSS Flexbox/Grid to collapse the split-view into a single column on mobile devices.
Developer Instructions
- Use a standard HTML5 boilerplate.
- Include Tailwind CSS via CDN for styling utility.
- Implement image projection logic using the Canvas 2D Context
drawImagemethod with coordinate transformation matrices. - Ensure no external assets (images/icons) are required unless via CDN (e.g., FontAwesome, Lucide).
- Test extensively on mobile Safari and Chrome for viewport height issues.
Spread the word
Files being used
Frequently Asked Questions
Everything you need to know about using this application.
How does this tool process my images securely?
This application utilizes pure client-side JavaScript and the HTML5 Canvas API to perform all image processing directly within your web browser. No files are ever uploaded to a server, ensuring that your 360-degree content remains completely private and secure throughout the entire conversion process. Because the heavy lifting happens locally on your machine, you never have to worry about data privacy, bandwidth consumption, or third-party interference. Once you close your browser tab, all temporary image data is purged from the application's memory immediately.
What is the primary use for converting 360 images to cubemaps?
Converting equirectangular images into cubemaps is an essential workflow for game developers, 3D artists, and virtual reality content creators who need to generate skyboxes or reflection maps. By splitting the spherical 360 projection into six distinct square faces—front, back, left, right, up, and down—you create a format that is natively supported by engines like Unity, Unreal Engine, and Godot. This process allows developers to map 360-degree panoramas onto geometric objects within a 3D scene. By having individual texture files for each face, rendering engines can load the environment efficiently, providing a seamless and immersive 360-degree experience for the end-user.
Are there limits on the size or format of images I can upload?
The application supports standard high-resolution image formats including JPG, PNG, and WebP, which are typically used for 360 photography. While there is no hard-coded limit on image dimensions, processing extremely large files depends on the available RAM of your device's browser instance, so we recommend using high-quality 4K or 8K equirectangular source files for optimal results. Our tool is designed to handle common equirectangular aspect ratios (typically 2:1). If your image does not conform to standard proportions, the application will attempt to auto-adjust the projection mapping, though standard panoramic photos will yield the highest quality cubemap results.
Can I download all faces at once, or do I need to save them individually?
We provide a flexible download system that allows you to either save individual cubemap faces or export them all simultaneously as a structured ZIP archive. This feature is designed to speed up your workflow when preparing assets for complex 3D projects or rapid game environment prototyping. Simply select the faces you need from the preview gallery and click the appropriate button. The application generates the output blobs dynamically, allowing you to save the processed files directly to your local file system without any external dependencies.
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