Upscale images with AI in your browser
Upload an image, choose 2x or 4x, and create a larger version locally on your device.
Model: realesrgan-x4.onnx. Processing runs fully client-side in your browser.
2x or 4x upscale
Choose fast 2x or detailed 4x output depending on your needs.
Stable previews
Compare original and upscaled results side by side before download.
Fully local AI
Your files stay on your device. No upload to external servers.
Upscale images online without uploading files
Use iStyle.ch to enlarge images with AI directly in your browser.
How image upscaling works
Upload one image, choose 2x or 4x, start processing, and download PNG or JPG.
FAQ
Are images uploaded to a server?
No. The full upscaling pipeline runs in your browser.
Why is very large input reduced before upscaling?
To keep memory use stable on browsers and mobile devices, input is limited to 512px on the longest side before AI processing.
Upscale settings
Choose the upscale factor, check the preview, and start processing.
Upscale factor
4x gives maximum detail. 2x is faster and lighter on mobile devices.
Image was scaled down to 512px for processing. Maximum output is 2048px.
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Preview
Original and result previews stay stable for reliable comparison.
Your upscaled image is ready
Review the result and choose your download format.