JPG output sizes at 4×
Every pixel becomes a 4 × 4 block of 16 new pixels, filled in by the AI model instead of copied. File sizes are estimates for JPG output.
| Source | Output at 4× | Megapixels | Approx. JPG size |
|---|---|---|---|
| 640 × 480 Old webcam or phone | 2,560 × 1,920 | 4.9 | 1.6 MB |
| 1,024 × 768 Web image | 4,096 × 3,072 | 12.6 | 4.2 MB |
| 1,920 × 1,080 Full HD frame | 7,680 × 4,320 | 33.2 | 11 MB |
| 4,032 × 3,024 12 MP phone photo | 16,128 × 12,096 | 195.1 | 65 MB |
Where it runs and what it costs
- Runs
- On your device
- Plan
- Pro
- Suggested output
- JPG
4× runs on your device too, so nothing uploads, and needs the Pro plan. Files up to 100 MB work on the free plan, and nothing gets a watermark.
About JPEG files
Lossy format used by almost every camera and phone. Upscaling also cleans some compression blocks.
Output is written as PNG, JPG or WEBP. For JPG input, JPG is the closest match.
How to upscale JPG 4×
- Open the upscaler and drop your .jpg files. Free batches take 5 files, Pro batches take 200.
- Choose 4× and a model: Photo for camera shots, Illustration for art and logos, Scanned text for documents.
- Pick JPG as the output format, or PNG if you need lossless pixels.
- Start the batch and download each file or a ZIP of all of them.
Questions
Is upscaling JPG 4× free?
4× is part of the Pro plan. The free plan covers 2× for 5 images a day.
Does my JPG file upload anywhere?
No. At 4× the image is decoded and enlarged inside your browser, and the file never leaves your device.
How big is a JPG after 4× upscaling?
Width and height both grow 4 times, so the pixel count grows 16 times. A 1920 × 1080 image becomes 7,680 × 4,320, about 11 MB as JPG.
Does upscaling fix JPG compression blocks?
Partly. The AI models smooth out many of the 8 × 8 compression blocks while they add detail. Heavy artefacts from a very low quality save will still show.
Why does 4× need Pro if it runs on my device?
4× is part of the Pro plan. The work still happens in your browser, so your files do not upload even on Pro.