Requirement guide
Keep enough visual detail for screenshots and photos while staying below a 200 KB requirement.
The 200 KB preset is a better starting point for screenshots and images where small text or edges need to remain legible. It still checks the actual encoded bytes, and it keeps the output name separate from the original.
Some destinations require PNG for transparency or a particular color behavior. Choose the format explicitly when the destination says so, then review the warning about transparency and the measured output before the file leaves the browser.
Questions people ask
Sometimes. PNG compression does not use the same quality slider as JPEG or WebP, so the result may still fail if the canvas contains complex photographic detail.
No. ZIP bytes are assembled locally in the browser after the individual outputs have been validated.