---
title: "Upscale a photo 4× free · Cutshed"
description: "Upscale a photo to four times the pixels in the browser with Real-ESRGAN, then download a PNG. The image stays on this device and is not uploaded."
canonical: "https://cutshed.com/image-upscaler/"
---

# Upscale a photo 4× free · Cutshed

Upscale a photo to four times the pixels in the browser with Real-ESRGAN, then download a PNG. The image stays on this device and is not uploaded.

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- / Upscale a photo 4× free
Image · 19
# Upscale a photo 4× free
Cutshed Image upscaler is a free browser tool that runs on this device. Upscale a photo 4× with Real-ESRGAN general x4v3.
Real-ESRGAN’s small general model multiplies each side by four. The long edge is capped at 512 pixels before that, so a phone tab can finish, and the export is at most about 2048 on the long side.
## How to use it
- The network is SRVGGNetCompact, input RGB in 0–1, output four times the width and height. The page cuts the picture into 128-pixel tiles so one tensor does not own the whole image. Tiles run on WASM. WebGPU is skipped because this graph’s shapes change with the tile.
- A 32×32 icon becomes 128×128. A 4000-pixel photo is reduced to a 512 long edge first, then scaled, so you do not wait on a multi-gigabyte tensor. If you need a specific crop sharp, crop first, then upscale that crop.
- The look is a learned guess of edges. Text and faces can look over-sharp or waxy. It will not recover a license plate that was ten pixels tall.
## Tips
- Upscale a thumbnail-sized still, not a 4K frame you already have.
- PNG output is large. Convert to JPG afterwards if you are posting it.
- Run it once. A second pass invents more texture than detail.
## FAQ
- Which Real-ESRGAN file is this?
realesr-general-x4v3, the compact general model, about 4.6 MB. The older x4plus network is much larger and is not shipped.
- Why is my photo not 4× the original size?
Sources longer than 512 pixels on the long edge are reduced first. The cap keeps the tab alive.
- Is the image uploaded?
No.
## License
Real-ESRGAN is BSD-3-Clause (Xintao Wang, Liangbin Xie, Chao Dong, Ying Shan, and contributors). ONNX Runtime Web is MIT. The model license does not cover the photo.
## Related tools
- Image Background remover Cut the subject out and download a PNG.
- Image Image converter Compress or convert JPG, PNG, WebP, and AVIF.
- Image Thumbnail maker Lay out a 1280×720 YouTube thumbnail.
Files stay on this device.
Free tools never upload the file you open. Studio is the only paid part of the site, and the only place a prompt is sent to a video model.

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