Quality, dimensions, and format all affect file size
The quality slider re-encodes the image in the selected output format. For photographs, JPG or WebP often produces a smaller file than PNG. PNG is useful when you need transparency or sharp flat graphics, but changing the quality control may not shrink it like a lossy format.
The target-size mode tries different quality settings and may also reduce dimensions. It reports whether the KB or MB limit was actually met; it cannot guarantee an exact file size for every image.
Compare the image before downloading
Inspect the before-and-after preview and the reported original and output sizes. Zoom in on text, edges, faces, and gradients; aggressive compression can introduce blur or blocky artifacts.
If a 4 MB image becomes 1 MB, the saving is 75%. If the result becomes larger, try another format or a lower quality setting. Keep the original so you can export again without compounding quality loss.
Privacy and device limits
The selected image is decoded and re-encoded in your browser rather than uploaded to ToolVerse. Browser support for an input format depends on the device; an unsupported format produces an error instead of a misleading download.
Very large images can exceed the memory available to a phone or browser tab. Resize first or use a smaller source image if processing fails.