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Image Upscaler
Image Upscaler enlarges pictures with high-quality interpolation and a sharpening pass, using canvas resampling rather than a generative model. It is honest about the trade-off: it makes a picture larger and cleaner on screen, but it cannot invent detail that was never captured.
How to use Image Upscaler
- Upload the image you want to enlarge.
- Choose the scale factor, for example 2× for a doubling of each dimension.
- Upscale and download the enlarged picture.
Where Image Upscaler is useful
- Preparing a small logo or icon for a layout that needs more pixels.
- Enlarging a slightly undersized product photo for a listing.
- Scaling up screenshots for a document where they appear zoomed.
Formats, algorithms and limits
The tool uses the browser's smooth high-quality resampling plus a light contrast-sharpening pass afterwards, which reduces the characteristic softness of interpolation. Doubling dimensions quadruples pixel count, so a 2× enlargement of a 4000-pixel image is a 16-megapixel result.
Troubleshooting and honest limits
- Stay within 2× for photographs: beyond that, interpolation softness becomes visible.
- Sharpening helps photographs but can exaggerate noise, so judge the result at 100% zoom.
- For print, aim to reach at least 200 dpi at the final physical size rather than chasing a specific pixel count.
Frequently asked questions
Does this use AI to upscale?
No. It uses high-quality interpolation and a sharpening pass. Generative upscaling, which invents plausible detail, is a different class of tool and is not what runs here.
How large can I go?
There is no hard limit beyond device memory, but quality degrades as the factor grows because the extra pixels are interpolated, not captured.
Can upscaling restore a blurry photo?
It can make it larger and slightly crisper, but real recovery of lost detail needs a specialist restoration model.
Which format should I save as?
PNG if the image is graphics or contains text, JPEG for photographs where file size matters.
Related tools
Page written and reviewed by the FreeConvertio engineering team on 2026-10-14. Image Upscaler runs entirely in your browser — no uploads, no account and no daily limits.