Image Upscaler Online Free — Enlarge Images Without Losing Quality
Upscale and enlarge photos 2× or 4× using AI super-resolution — entirely in your browser. No upload, no account, no watermark. The AI model reconstructs sharp details, edges, and textures that traditional resizing blurs. Perfect for old photos, product images, and low-resolution screenshots.
Frequently Asked Questions
How does AI image upscaling work?
AI upscaling uses a trained neural network (ESRGAN-style) to predict what higher-resolution pixels should look like based on patterns learned from millions of images. Unlike traditional bicubic interpolation which simply averages neighboring pixels, AI upscaling can reconstruct sharp edges, textures, and fine details that were blurry or missing in the original.
What is the maximum upscale factor?
2× and 4× are supported. 2× doubles both width and height (a 500×400 image becomes 1000×800). 4× quadruples both dimensions (500×400 becomes 2000×1600). Note that 4× on large images may take a long time or fail on low-memory devices.
What types of images work best?
Old scanned photos, product images with small dimensions, low-resolution screenshots, and profile pictures. The AI model excels at faces, text, and structured patterns. Abstract noise and heavily compressed JPEG images (heavy artifacts) show less improvement.
Is my image uploaded anywhere?
No. All processing happens in your browser using WebAssembly and TensorFlow.js. Your image data never leaves your device. The only network request is the one-time model download (~5–10MB) on first use.
What is the difference between AI upscaling and regular resizing?
Standard resizing (bicubic interpolation) smoothly blurs edges when enlarging — this is why enlarged images look blurry and soft. AI upscaling reconstructs sharp details based on learned patterns, producing cleaner edges, sharper text, and more natural-looking textures.
Why does it say "first time: 5–10MB download"?
The AI model weights (~5–10MB) are downloaded once from a CDN and cached in your browser. After the first use, the model loads instantly from cache — no re-download needed.
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