AI Image Upscaler Online Free
Increase image resolution using AI. Upscale photos 2× or 4× with sharp, natural results. Real-ESRGAN model runs entirely in your browser — no upload needed.
Frequently Asked Questions
How does AI image upscaling work?
Our AI model (Real-ESRGAN) analyzes your image and intelligently adds detail when increasing resolution. Unlike simple stretching, AI upscaling creates sharp, natural-looking results.
What's the difference between 2× and 4× upscale?
2× doubles the dimensions (e.g., 500×500 → 1000×1000). 4× quadruples them (500×500 → 2000×2000). 4× takes longer and produces larger files.
What image sizes work best?
Images under 1024px work best. Very large images are automatically downscaled before processing to avoid memory issues, then upscaled to your target size.
Is my image uploaded to a server?
No! The AI model runs entirely in your browser using WebAssembly. Your images never leave your device.