AI Upscale

Enhance image resolution with deep learning. Runs entirely in your browser — no upload, no server.

Drop your image here 🍡

PNG, JPG, WebP, BMP — any size, mochi handles it all

Files never leave your device
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After upscaling, use Sharpen to add crispness, or Compress to optimize the larger file for web delivery.

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How to Upscale Images with AI Online

Enhance your image resolution using deep learning AI directly in your browser. imagemochi's AI upscaler uses RealESRGAN, a state-of-the-art super-resolution neural network, to intelligently add detail and clarity when enlarging images. Unlike simple bicubic or bilinear interpolation, AI upscaling reconstructs realistic textures, edges, and fine details that weren't in the original. Perfect for enlarging small photos for printing, enhancing old low-resolution images, or preparing images for high-DPI displays. Everything runs locally in your browser — your images are never uploaded to any server.

1
Upload
Drop your image or click to browse
2
Configure
Choose 2x or 4x scale and AI model
3
Upscale
Watch the AI enhance your image tile by tile

Frequently Asked Questions

How does browser-based AI upscaling work?
imagemochi loads a lightweight deep learning model (RealESRGAN, ~5MB) directly into your browser using ONNX Runtime Web. The AI runs on your device's GPU via WebGPU, or falls back to CPU via WebAssembly. Your images never leave your computer — all processing happens locally.
What's the difference between 2x and 4x upscaling?
2x doubles your image dimensions (e.g., 500×500 → 1000×1000) and 4x quadruples them (500×500 → 2000×2000). 4x takes longer but produces much larger output. Both use the same AI model for detail enhancement.
Which AI model should I choose?
General (5MB) works best for photographs, screenshots, and most images. Illustration (18MB) is optimized for anime, digital art, and illustrations with flat colors and sharp lines. When in doubt, start with General.
Is there a file size or resolution limit?
Input images up to 4096×4096 pixels are supported. Larger images are automatically resized before upscaling. For best speed, keep inputs under 2048×2048. The AI processes images in small tiles, so even large images work without running out of memory.
Does this work on mobile devices?
Yes! On mobile, the AI uses WebAssembly (CPU) instead of WebGPU. It's slower than desktop but fully functional. A 512×512 image takes about 10-15 seconds on a modern phone.
Is this really free? What's the catch?
100% free, no signup required. Since the AI runs in your browser (not our server), there's no GPU cost for us. Your images never leave your device, so there's no privacy concern either.