Image Upscaler

ready

Drop your image here PNG, JPG, WebP · or click to choose The ESRGAN neural network runs on your device. Your file is never uploaded.

Original AI 2×

— → — Ready

How to upscale a photo with AI

The tool enlarges an image 2× or 4× using the Real-ESRGAN neural network. Instead of simply stretching pixels, the network reconstructs sharp edges and textures. This is useful for improving the quality of a small photo for printing or a product listing, or for enlarging an AI-generated image or an old picture from the internet. Everything is processed in your browser.

How to use it

Click "Open image", drag a JPG, PNG or WebP into the window, or paste an image from the clipboard (Ctrl+V).
Choose the scale: 2× or 4×.
Choose the quality: "Fast" or "Maximum".
Click "Upscale" and wait for it to finish. Progress and time remaining are shown at the bottom.
Compare the result with the original using the slider and click "Download PNG".

Settings and tips

2× doubles the width and height: 800×600 becomes 1600×1200. It's faster and fits most cases. 4× is better for very small source images.
Fast is a compact model (about 5 MB). It works almost everywhere: on the GPU via WebGPU or WebGL, or on the CPU if neither is available.
Maximum handles old and heavily compressed photos better and removes JPEG artifacts. The model is about 70 MB, downloads once, and runs slower. It requires a browser with WebGPU.
If your device runs out of memory, start with 2× or use a smaller source image.

Limitations

Source images up to 40 megapixels. Output up to 16.7 megapixels and no more than 8192 px on either side. If 4× doesn't fit, the tool will suggest 2×.
The result is always saved as PNG, so the file is larger than the original.
Transparency is not preserved: transparent areas become a solid background.
The network can distort small text, facial features and repeating patterns. Check the result at full size before printing.
This isn't restoration: the tool doesn't remove scratches or heavy noise.

Privacy

Your photo is not uploaded to a server: the neural network runs on your device. Only the model (from mozgi.io) and libraries (from cdnjs and jsDelivr) are downloaded from the internet. The site collects visit statistics: Cloudflare Web Analytics without cookies, while Yandex Metrica and Google Analytics load only if you've accepted cookies. Learn more in our privacy policy.

After upscaling, the PNG can be large — compress the photo online to WebP. Photo cropping helps you adjust the frame, and for 3D effects there's the online depth map tool.

Photo upscaling FAQ

How is this better than regular resizing?

Regular enlarging simply duplicates pixels, and the image turns blurry. The neural network restores edges and texture, so the result looks sharper.

Can I improve the quality of an old or heavily compressed photo?

Yes — choose "Maximum": that model is better at removing JPEG blocks. It won't restore scratches or lost facial detail.

Why is the "Upscale" button disabled?

The result would exceed the 16.7 MP limit. Choose 2× or open a smaller source image.

Do I need a subscription?

For the first hour you can use it without signing up or subscribing — the hour counts from the first time you open any of the locked mozgi.io tools. After that you need a subscription: it gives full access to all locked tools, prompts and skills. There are no watermarks.