Upscale an Image Online with AI Super-Resolution
Upscale an image online to a higher resolution without the blur of ordinary resizing. This image upscaler runs a Swin2SR super-resolution neural network right in your browser, rebuilding edges, text, and texture as it enlarges so the result stays sharp at 2x or 4x.
It is built for anyone who needs to enlarge a small photo, product shot, screenshot, or graphic and increase image resolution while keeping detail. Drop an image, pick a scale, and compare the AI result against a plain browser stretch side by side before you download.
How to Upscale an Image
Add your image
Drop an image onto the upload area, click to browse your device, or paste a copied image with Ctrl+V (Cmd+V on Mac). JPEG, PNG, and WebP files are supported.
Choose a scale
Pick 2× to double the dimensions or 4× to quadruple them. A 400×300 image becomes 800×600 at 2×, or 1600×1200 at 4×.
Run the upscale
Click Upscale. The AI model downloads on first use and is cached for next time, then a progress message tracks loading and processing. The 4× mode runs the model twice.
Compare and download
Drag the before/after slider to see how much detail the AI keeps versus a standard stretch. Choose PNG, JPEG, or WebP, set the quality if asked, and download.
Features
AI Super-Resolution
Powered by the Swin2SR restoration model, which reconstructs edges, text, and texture that plain interpolation loses.
2× and 4× Upscaling
Double or quadruple your resolution. The 4× mode runs the model a second time for maximum enlargement.
Before/After Comparison
A draggable slider puts the AI result next to a standard browser resize so you can judge the difference at a glance.
PNG, JPEG, or WebP Export
Save lossless PNG, or JPEG and WebP with an adjustable quality slider for smaller files.
GPU Acceleration
Uses WebGPU when your browser supports it for faster, non-blocking processing, and falls back to WebAssembly otherwise.
Drag, Browse, or Paste
Add images by dropping a file, clicking to browse, or pasting from your clipboard. Oversized inputs are resized automatically for smooth processing.
Frequently Asked Questions
How do I upscale an image online?
Add an image by dropping it, clicking to browse, or pasting it, choose 2× or 4×, then click Upscale. The AI processes the image in your browser and you can compare and download the result. Nothing to install or sign up for.
Can I enlarge an image without losing quality?
The AI reconstructs detail as it enlarges, so results stay much sharper than a plain stretch, which simply blurs the existing pixels. No upscaler can invent detail that was never captured, but Swin2SR keeps edges and texture crisp far better than ordinary resizing.
Is this image upscaler free and without sign-up?
Yes. The tool runs in your browser with no account needed. Your images are never uploaded to a server, so processing happens entirely on your own device.
What is the difference between upscaling and resizing?
Resizing just changes the dimensions, stretching the same pixels so an enlarged image looks soft. AI upscaling adds resolution by generating new, plausible pixels for edges and texture, so the larger image stays sharp instead of blurry.
Should I upscale 2× or 4×?
2× doubles the dimensions in a single pass and usually gives the best balance of quality and speed. 4× runs the model twice to quadruple the dimensions for maximum enlargement, which takes longer. To keep processing smooth, inputs are resized to about 512px before a 2× run and 256px before a 4× run.
What image formats can I upscale?
You can upload JPEG, PNG, and WebP images. When you download, you can export the upscaled result as PNG for lossless quality, or as JPEG or WebP with an adjustable quality slider for smaller file sizes.
Why does the first upscale take longer?
The AI model is downloaded the first time you upscale. After that it is cached in your browser, so later upscales start much faster. If your browser lacks WebGPU support, the model runs on the CPU via WebAssembly, which can briefly slow the page during processing.
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