1
Open and duplicate the image
Open your photo in a layer-based editor, duplicate its image layer, and keep the original hidden underneath. Zoom in enough to distinguish the subject from the background, but periodically zoom out to judge the whole silhouette. For a JPEG, remember that the starting file has no transparent pixels; transparency comes from your edit and your eventual export format.
2
Trace the subject
Use a pen path for smooth product outlines or a lasso for less regular shapes. Place fewer pen points along straight or gently curved edges and more where the contour changes direction. Close the path and convert it to a selection. Do not spend time tracing individual hairs or tiny gaps yet; first secure the main shape.
3
Make a reversible mask
Apply the selection as a layer mask rather than deleting pixels. If the wrong side disappears, invert the mask. Hide the original layer and place a contrasting temporary color behind the cutout. This makes missed background patches and holes in the subject much easier to spot than a checkerboard alone.
4
Refine and inspect the edge
Paint on the mask with a small, soft brush: black hides unwanted background and white restores parts of the subject. Use a harder brush for crisp packaging or furniture edges. Inspect against both light and dark temporary backgrounds; a pale fringe that disappears on white may stand out immediately on charcoal.
5
Save the source, then export
Save the editor's layered file first so the mask remains adjustable. For a cutout with transparency, export to a format and settings that preserve an alpha channel, such as PNG. Reopen the exported file over a contrasting background to confirm that the old backdrop is truly gone rather than replaced with solid white.