What this tool does
TubeCraft decodes the selected image in your browser, runs a fixed 2× ESRGAN model and creates a new PNG. A 600 × 400 image becomes 1200 × 800. The model estimates detail rather than recovering information that never existed, so compare fine text, faces and product edges with the original before publishing.
Check the result: AI enlargement can invent or alter detail. It does not guarantee 4K output, because the final dimensions depend on the input image.
How to use it
- Choose a PNG, JPEG or WebP image.
- Wait while the browser loads the AI model and processes the image.
- Drag the comparison slider to inspect the original and the 2× result.
- Download the generated PNG.
Supported formats and limits
| Input formats | PNG, JPEG and WebP still images |
|---|---|
| Input limit | 20 MiB and 1 megapixel |
| Output | PNG at exactly 2× width and 2× height |
| Device needs | JavaScript, WebGL and enough browser memory |
Useful for
- Enlarging a small thumbnail before further editing
- Preparing a larger reference image for a presentation
- Testing whether AI enhancement helps an old compressed image
Private browser processing
Your selected media stays on your device during processing. The site downloads the code and model files required for the selected task, so the first run can take longer. Processing speed and memory use depend on the device.
Frequently asked questions
Does AI Image Upscaler upload my media?
No. The selected media is processed in your browser. Loading the page, processing libraries and anonymous site analytics still use network data.
Is the tool free?
Yes. It can be used without registration. Browser memory, file size and duration limits apply.
Why can processing fail?
A file may use an unsupported codec, exceed a stated limit or require more memory than the device can provide. Try a smaller file or a current desktop browser.