Image Upscaler
Enlarge images 2×–4× with smart sharpening and denoise.
Files and text are processed locally in your browser. Tools that must reach the network say so explicitly.
About the Image Upscaler
Enlarge an image 2×, 3× or 4× while keeping edges crisp. The Toolcenter Image Upscaler uses multi-step high-quality resampling followed by an adjustable unsharp mask to recover perceived detail. It is not a neural network, so it is instant and private — everything runs in your browser and nothing is uploaded.
How to use it
- 1Drop the image you want to enlarge.
- 2Choose a 2×, 3× or 4× factor.
- 3Set the sharpening amount.
- 4Run the upscale and download the PNG.
Key features
- 2×, 3× and 4× enlargement
- Stepwise resampling for smoother results
- Adjustable unsharp-mask sharpening
- PNG output at full resolution
- Local processing, no upload
Frequently asked questions
Can it add detail that isn’t there?+
No. It improves smoothness and perceived sharpness but cannot invent texture the way a trained AI model attempts to.
What is the best factor to use?+
2× gives the cleanest result. 3× and 4× are usable for web display but soften fine detail.
Which images upscale best?+
Clean, low-noise images with clear edges. Heavily compressed or noisy photos amplify their artefacts.
Is the image uploaded?+
No. Upscaling runs entirely in the browser.
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