How Much Can You Upscale an Image Before It Looks Fake?
Upscaling is useful, but it is not time travel. A model can sharpen and infer detail, but it cannot recover the exact original pixels that were never in the file.
2x is the safer working range
Doubling a clean logo or icon often gives later tools more room to work. Edges can look less jagged, previews can be easier to inspect, and social exports have more source pixels to sample.
4x is situational
Four-times upscaling can help simple artwork, but it also makes invented detail easier to notice. Text, tiny symbols, and compressed edges can become overconfident and wrong.
Upscale before tracing, not after
If you only have a small PNG and need SVG, upscale first, then trace. Once the image is already converted into paths, the next task is path cleanup, not raster upscaling.
When to stop
Stop when the asset looks clean at its final display size. Do not chase huge dimensions for a favicon, browser tab icon, or small logo lockup. More pixels can also mean larger files and more artifacts.