Choose this when
The image is public, yours to use, and not relied on as evidence.
Consider an online image upscaler after checking its current terms.
The privacy stakes may be lower, but you still need to inspect the output for invented detail.
Choose this when
The image contains a recognizable person, an address, or work material.
Get permission where needed and review retention and access rules before uploading.
Sharpening cannot reverse disclosure of information sent to a service.
Choose this when
The original must remain an exact record.
Preserve the original and use a controlled, documented editing workflow instead.
An image upscaler can change the appearance of details that another person might mistake for facts.