SubjectScene
Step 01: Upload subject + scene
Upload a subject image and a replacement background image.
Free · No signup · New backdrop
Upload a subject and a new backdrop, then download a composited PNG — free, no account, no watermark.
Background Replacer
Compose your subject onto a new backdrop in a visual editor
Subject (foreground)
Drag & drop files here
Or click to browse (up to 15 MB)
Background (backdrop)
Drag & drop files here
Or click to browse (up to 15 MB)
Visual editor
Upload a subject and backdrop, then continue to position and resize before replacing.
Swap a subject onto a new background without a full design app.
Upload a subject image and a replacement background image.
Place, resize, zoom, and align the items in the visual editor.
Apply the composition and download the finished PNG.
I built it when you need a scene change without starting from a blank brand layout.
The editor keeps the subject and background separate so you can adjust placement quickly.
The background can be swapped without forcing a separate photo editing program.
You keep a real output file that can move directly into a landing page or product post.
See what Background Replacer is built to change — static marketing mock, not a live edit.
Original backdrop
New scene
Place items on lifestyle or studio scenes.
Keep a subject while changing the setting.
Reuse cutouts across seasonal backgrounds.
Build consistent hero visuals from one subject.
Formats, processing, and practical limits for this tool.
The subject cutout depends on the uploaded foreground and scene contrast. Heavy shadows, fuzzy edges, or very bright backdrops can reduce stitching quality.
Straight answers about this tool — privacy, formats, limits, and how processing works.
Two images: a subject photo and a replacement background. ImageToolkit segments the subject once, then you compose both layers in the browser editor before Apply.
No. Segmentation runs once (via remove-background) to prepare the cutout. Drag, scale, Fit/Cover, and front/back changes stay local until you Apply.
On Apply, subject and background scales must stay between 0.05 and 5, and positions are clamped to a large safe range (±2×6000 px). Values outside that range are rejected by the server.
A composited PNG named with a _replaced.png suffix. Apply posts your transforms with already_cutout=true so the server composes without running segmentation again.
Use Background Remover when you only need a clear subject on transparency. Use Replacer when you already have a new scene to place behind the subject.