Is my JPG uploaded to a server?

No. The JPG is enlarged entirely in your browser: it never leaves your device, and there's no queue and no account.

How is this better than normal resizing?

Normal resizing spreads the same pixels over a larger area, which blurs. This tool redraws edges and fine texture at the new size — the before/after slider shows the difference on your own image.

What format is the result?

A high-quality JPG at the enlarged resolution — the right format for photos.

Upscale JPG images

Upscale a JPG image to 2× or 4×, free and 100% in your browser. No upload, no signup — detail is rebuilt automatically at full resolution.

How to upscale an image

Drop or pick your JPG image.
Choose 2× or 4× — the enlargement runs entirely on your device.
Compare against the original with the slider and save the result.

About upscaling

JPEG is the universal lossy photo format, small and readable everywhere, but with no transparency. Enlarged JPG photos are delivered as JPG again at a high-quality setting, at 2× or 4× the original resolution.

Detail is rebuilt on your device as the image grows — edges and texture are redrawn instead of stretched, so small images come out crisp. Nothing is uploaded, and the full-size result is free. The first run downloads the upscaler (~9 MB) once; your browser keeps it for later visits.

Frequently asked questions

Is my JPG uploaded to a server?: No. The JPG is enlarged entirely in your browser: it never leaves your device, and there's no queue and no account.
How is this better than normal resizing?: Normal resizing spreads the same pixels over a larger area, which blurs. This tool redraws edges and fine texture at the new size — the before/after slider shows the difference on your own image.
What format is the result?: A high-quality JPG at the enlarged resolution — the right format for photos.