Replace any photo background with AI
Upload a photo, describe the new background you want in plain English, and renza replaces it. Studio backdrops, beach scenes, office settings, anything. The lighting on your subject adjusts to match the new environment automatically.
About the background changer
Background replacement is the natural next step after background removal — and modern image-edit models can do both in one call. Rather than the old two-step workflow (remove bg, then paste subject onto new bg with manually-matched lighting), Flux Kontext Pro re-renders the entire scene with your subject still in place but with a new described environment. The crucial advantage: the lighting on your subject's face and clothing is automatically adjusted to match the new background, so the composite looks natural rather than 'pasted-on'. Common use cases include LinkedIn headshots with a swap from messy room to professional studio backdrop, product photos with a swap from kitchen counter to clean marble surface, real estate agent portraits with a swap to a tasteful neutral environment, and just-for-fun photos placing the subject on a beach, in space, in a Tokyo street, or anywhere else describable.
How it works
- 01
Upload your photo
Drag and drop or click to upload. Any JPEG or PNG works.
- 02
Prompt is pre-filled
The right model and prompt are loaded for you. Edit if you want a different result.
- 03
Run and download
Result is ready in 5–15 seconds. Download or run again with different settings.
Tips for best results
Things that meaningfully improve the output.
Describe the background specifically
Vague prompts like "outside" give generic results. Specific prompts like "wooden Tokyo back-alley at night with neon shop signs and gentle rain" give striking results.
Mention the lighting
Add cues like "soft golden hour light from the left" or "harsh midday sun" — the model will adjust the subject lighting to match.
Use for LinkedIn headshots
Photo at home with messy room? Prompt 'replace background with clean professional studio grey backdrop, soft lighting'. Instant LinkedIn-ready headshot.
Keep the subject in shot
Background change works best on photos where the subject takes up at least 40% of the frame. If the subject is tiny in the frame, crop closer first.
Try it on your photo
Upload any image — the background changer runs in seconds.
Open the tool →No credit card. Free credits at signup.
Frequently asked questions
Will the subject lighting match the new background?
Yes — that is the main advantage of using a modern image-edit model over an old cut-and-paste workflow. Flux Kontext Pro adjusts the lighting on the subject to fit the new environment automatically.
How specific should my background description be?
As specific as you want. "Beach" works fine; "tropical beach at sunset with palm trees and golden hour light from the left" produces a much more striking result.
Can I use this for ecommerce product photos?
Yes, very common use case. Replace 'kitchen counter' with 'minimalist marble surface with soft side lighting' for instant studio-quality product shots.
How long does it take?
5–15 seconds per replacement.
Cost?
Around 3 credits through Flux Kontext Pro. Credit packs start at $4.99 for 50 credits.