---
title: "How to upscale an image with AI | ToolSugar"
description: "Enlarge a small photo to twice its width and height with an AI model that runs in your browser, and learn what to expect from it."
canonical: https://toolsugar.com/blog/how-to-upscale-an-image
image: https://toolsugar.com/og.png
---

# Upscale an image to 2x with AI

Updated 2026-11-09

To upscale an image with AI, run it through a super-resolution model that doubles its width and height and fills in plausible detail. Image Upscaler on ToolSugar runs the Swin2SR model on your own device through your browser, so the photo is not uploaded. Expect a download of about 54 MB from Hugging Face on the first run.

[Open Image Upscaler](https://toolsugar.com/tools/image-upscaler)

## Upscale an image in four steps

Small and low resolution photos gain the most from this tool.

1. Add a small or low resolution photo. Images up to about 250,000 pixels fit, for example 500 by 500.
2. Read the note about the one time model download and press Enlarge 2x.
3. Wait while the model downloads on the first run and enlarges the picture. You can cancel at any time.
4. Check the doubled result and download the PNG.

## What 2x really means

The output has twice the width and twice the height, which is four times as many pixels. A 500 by 500 photo becomes 1000 by 1000. The file is a PNG, named like your original with 2x added.

## AI upscaling versus stretching

Plain resizing spreads the pixels you have over a bigger area, and the picture goes soft. A super-resolution model guesses what the missing detail would look like, based on the many pictures it learned from. Edges and textures usually come out sharper.

It is still a guess. The model cannot recover a face or a line of text that was never in the photo, so small faces and tiny letters can stay soft or look slightly off.

## Size limit, speed and the first run

The model runs on your computer's processor, and the work grows fast with the pixel count. That is why the input is capped at about 250,000 pixels. For a larger photo, shrink it with Resize Image first.

A run can take a few minutes. The first run also downloads the model, and your browser keeps it afterward.

## Questions

### Can I enlarge by 4x?

Not in one step. The tool makes 2x only. You can run the result through it again if it stays under the pixel limit.

### Can I stop a run that takes too long?

Yes. Press Cancel at any time and the run stops.

### Is a large photo a good fit?

No. A big photo already has plenty of pixels and would exceed the limit. This tool is for small pictures such as avatars and old scans.

[Open Image Upscaler](https://toolsugar.com/tools/image-upscaler)

## Related guides

- [How to resize an image by pixels, percent or KB](https://toolsugar.com/blog/how-to-resize-an-image)
- [How to remove the background from an image](https://toolsugar.com/blog/how-to-remove-the-background-from-an-image)
- [How to compress an image without losing quality](https://toolsugar.com/blog/how-to-compress-an-image)
- [How to convert image formats: JPG, PNG, WebP](https://toolsugar.com/blog/how-to-convert-image-formats)