If the resolution is a typical web graphic resolution, eg 72 or 96 dpi, then enlarging the image will make the image quality degrade significantly. If the image is pure vector graphic, then you can enlarge or decrease at will. However, it is very uncommon for a web image to be an svg as it normally doesn’t make any sense. 

The only way enlarging an image increases the quality is if it is (currently) at a high dpi, and the image is currently artificially constrained to a much smaller size.

Hope that helps.

Steve

> On Dec 2, 2021, at 8:08 AM, Jodie Gambill <[log in to unmask]> wrote:
> 
> I know it's not free, but we've had good success using Gigapixel AI from
> Topaz Labs for this kind of work. https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.topazlabs.com%2Fgigapixel-ai&amp;data=04%7C01%7Csteven.j.turner%40ua.edu%7C5ab3fbf6882944114d7e08d9b59d5f88%7C2a00728ef0d040b4a4e8ce433f3fbca7%7C0%7C0%7C637740510381388856%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=hwf53ynkSCV%2FyZsh5AfiN5x1MD4%2ByXJ4pWm4Wuv5rnw%3D&amp;reserved=0
> -Jodie
> 
> On Wed, Dec 1, 2021 at 7:14 PM charles meyer <[log in to unmask]> wrote:
> 
>> Hi my esteemed listmates,
>> 
>> I need to take a graphic I download (with permission) off a Website and
>> make it 1920x1080, or larger by the same ratio so its quality will be
>> higher.
>> 
>> It would be even better if I could convert it into 3840x2160.
>> 
>> Has anyone used a FREE Windows tool to do that?
>> 
>> I understand Photoshop can do that but I don't have Photoshop so I need to
>> accomplish this with something simpler like MS Paint.
>> 
>> Has anyone achieved these improved graphic results with MS Paint?
>> 
>> If so, could you pls share the steps?
>> 
>> I'm guessing it cna  be done in GIMP but GIMP can be at best challenging.
>> 
>> Thank you kindly.
>> 
>> Charles.
>>