isixe / bg2x

bg2x 
 A free, privacy-first AI image super-resolution (upscaling) tool that runs entirely in your browser. 
 Demo ·
 Installation ·
 Desktop App ·
 GitHub 
 简体中文 
## Features
- **AI-Powered Super Resolution** — Upscale images up to 4x with Real-ESRGAN, Swin2SR, and Real-CUGAN models.
- **Privacy Protected** — 100% client-side inference through ONNX Runtime Web inside a Web Worker. No backend, no uploads.
- **Multiple AI Models** — 10 specialized models for photos, anime, illustrations, and compressed images.
- **GPU Acceleration** — Runs on WebGPU when available, with automatic fallback to WASM.
- **Multiple Export Formats** — Export as PNG, JPG, or WebP, and download a whole batch as a ZIP.
- **Drag & Drop Support** — Add images through drag-and-drop or the file picker.
- **Batch Processing** — Queue multiple images and process them one after another.
- **Offline-Friendly Model Cache** — Models are cached in IndexedDB after the first download.
- **Trilingual Interface** — English, Chinese, and Japanese, with light and dark themes.
- **Desktop App** — Native Electron builds for Windows, macOS, and Linux.
## Tech Stack
| Category | Technology |
| ---------------- | -------------------------------- |
| Framework | Astro 5 + Vue 3 |
| Language | TypeScript |
| Styling | Tailwind CSS v4 |
| State Management | Pinia |
| Routing | Vue Router |
| i18n | Vue I18n |
| AI / ML | ONNX Runtime Web (WASM / WebGPU) |
| UI Components | shadcn-vue + Reka UI + Lucide |
## Available Models
Models are downloaded on demand from Hugging Face and cached locally in IndexedDB. A ModelScope mirror is used as a fallback when the primary source is unreachable.
| Model | Scale | Size | Best for |
| ------------------------------ | ----- | ------ | ------------------------------------------------------------------ |
| Real-ESRGAN AnimeVideo v3 | 4x | ~2.5MB | Fastest; tuned for anime and video frames with clean line art |
| Real-ESRGAN General x4v3 | 4x | ~4.9MB | Compact general-purpose 4x; balanced everyday default |
| Real-ESRGAN x4plus | 4x | ~67MB | High-quality general 4x; real photos and textures (slower) |
| Real-ESRGAN x4plus Anime | 4x | ~18MB | 6-block anime model; clean edges and flat colors for illustrations |
| Real-ESRGAN x4plus Anime 4B32F | 4x | ~5.2MB | Ultra-small 4-block anime model; fast and light |
| Swin2SR Lightweight x2 | 2x | ~8.1MB | Lightweight Swin2SR 2x upscaler |
| Swin2SR Classical x4 | 4x | ~55MB | Classical degradations; high fidelity on clean images |
| Swin2SR RealWorld x4 | 4x | ~53MB | Real-world / BSRGAN degradations; noisy or compressed photos |
| Swin2SR Compressed x4 | 4x | ~55MB | Heavily compressed JPEGs; suppresses block artifacts |
| Real-CUGAN 2x (HFA2k) | 2x | ~5.2MB | Anime-focused 2x; strong line preservation and denoising |
## Installation
### Clone the Repository
 [code] 
### Install Dependencies
 [code] 
> This project uses **pnpm**; `pnpm-lock.yaml` is the only lockfile. The `packageManager` field in `package.json` pins