Free · No sign-up · Private

Make any image 4K. Free.

AI upscaling and SVG conversion that runs right in your browser. Your images never leave your device.

Harbor RidgeSample
640 × 360
⇆
Before AI
Loading…
Drag across the image to compare. Zoom to 100% to judge real 4K detail, then drag to pan.

How it works

  1. Drop your image

    Any PNG, JPG or WebP. Photos, illustrations, screenshots and 3D renders all work.

  2. AI redraws it at 4K

    A Real-ESRGAN model runs on your own graphics chip, cleaning up blur and compression as it enlarges.

  3. Compare and download

    Drag the slider to check the detail, then save as PNG, JPG, WebP or a scalable SVG.

Questions

Is it really free?

Yes. There's no account, no watermark and no limit. All the processing happens on your device, so it costs nothing to run.

Are my images uploaded anywhere?

No. The image stays in your browser from start to finish. Only the app itself is downloaded.

Why is the first upscale slower?

The first time, your browser downloads the 9 MB AI model. After that it's cached, and each image takes about 5–60 seconds depending on your computer.

What's the difference between AI and Classic?

AI redraws edges and removes blur and compression for the sharpest result. Classic is an instant high-quality resize with sharpening, good for images that are already clean.

What is SVG output?

SVG redraws your image as vector shapes that stay sharp at any size. Smooth keeps soft shading, Detailed uses only sharp shapes for editing in design apps, and Flat cartoon gives a clean sticker look.