SimpleUtils

Subject Keeper

Keep any object in your image and erase everything else. Upload a photo, describe what you want to keep (like "soccer ball", "dog", or "coffee cup"), and the AI will isolate just that subject with a transparent background. Powered by CLIPSeg — runs entirely in your browser, no data sent anywhere.

Be specific — the AI will keep this and remove everything else.

Keep more (looser) Keep less (tighter)

How to Use Subject Keeper

  1. Upload any image (JPG, PNG, WebP)
  2. Type what you want to keep in the text field — be specific
  3. Adjust the sensitivity slider if the result keeps too much or too little
  4. Click "Isolate Subject" and wait for the AI to process
  5. Download your result as a transparent PNG

Frequently Asked Questions

How is this different from the Background Remover?

The Background Remover always tries to detect the main subject automatically. Subject Keeper lets you specify exactly what to keep with a text prompt — great when there are multiple objects and you only want one.

Why does it take so long the first time?

The AI model (CLIPSeg) is about 300MB and downloads to your browser on first use. After that it's cached, so subsequent uses are much faster.

What prompts work best?

Short, specific nouns work best: "soccer ball", "person", "dog", "red cup", "tree". Avoid vague descriptions or full sentences.

Is my image uploaded anywhere?

No. Everything runs entirely in your browser. Your image never leaves your device.