Convert formats, resize dimensions, and tune compression entirely in your browser with the HTML5 canvas pipeline.
It depends on the output format and quality slider. PNG and WebP (lossless modes) keep more detail; JPEG uses lossy compression, so lower quality settings create smaller files with more visible artifacts.
Scaling up increases pixel dimensions, but it cannot invent missing detail. Prefer starting from a higher-resolution original when print or large-screen sharpness matters.
No. Image decoding, resizing, and encoding run locally in your browser session. Closing or refreshing the page clears in-memory working files.