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All processing runs locally in your browser · No data uploaded · 100% private
ToolsChange Image Background ColorProduct Photo White BackgroundID Photo Background ChangerPassport Photo Background ChangerWebP Background RemoverTransparent PNG MakerBatch Background Remover
BGZero

AI-powered background removal tool
Runs locally in browser, zero data upload

Open Source Licenses

  • Default engineAGPL-3.0
  • Transformers.jsCC BY-NC 4.0
  • rembg-webMIT
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© 2026 BG Zero. Released under AGPL-3.0.粤ICP备2026016654号-2Made with care · Local first

Manual Background Removal

Color picker + Flood Fill precise removal · Mask protection · Undo/redo

Color PickMask ProtectUnlimited Undo

Drag image here

or click to select, supports JPG · PNG · WebP · AVIF · BMP

Max 25MB · Ctrl+V to paste

How to Use Manual Mode for Precise Background Removal

Color pick + Flood Fill + mask protection — full control over what gets removed

01

Pick: Select the Background Color

Use the Pick tool to click on the background color. The system records the target color. Pick multiple times for different areas.

02

Protect: Mask Brush to Mark the Subject

Paint over areas you want to keep with the mask brush. Protected pixels won't be removed by Flood Fill. Press M to switch.

03

Remove: Flood Fill Precise Erasure

Adjust the tolerance slider to control removal range, then click 'Remove'. Repeat to gradually clean up. Unlimited undo supported.

Why Choose Manual Mode

Pixel-level precision — perfect for complex backgrounds
Mask brush protects the subject from accidental removal
Flexible tolerance slider — from precise to broad control
Unlimited undo/redo — experiment with confidence
Combine with auto mode: AI rough pass first, then manual refinement
Same 100% local processing — your privacy is always protected

Need a full guide on cleaning up background removal results? Background eraser guide → · Read the cleanup workflow guide → · Picsart background remover alternative →

Manual Background Removal FAQ

Everything you need to know about color-pick precise erasure

Manual mode is ideal when auto mode can't precisely identify the background — for example, when the background and subject are similar in color, when you need to keep specific areas, or when you only want to remove part of the background. Manual mode uses a color picker to precisely select target colors, with a mask brush to protect the subject.

Use the Pick tool to click on a background color in your image. Click 'Remove' to execute Flood Fill, which spreads outward from the pick point, turning similarly colored connected pixels (controlled by the tolerance slider) transparent. You can pick and remove multiple times to gradually clean up the background.

The Protect Brush lets you mark areas you want to keep before removing the background. Masked pixels won't be affected by Flood Fill, even if their color is similar to the background. Great for protecting subject edges, text, or objects with background-similar colors. Press M to switch to the brush, E for the eraser.

Manual mode supports JPG, PNG, WebP, and BMP formats, up to 25MB per image. Results are exported as transparent PNG files. Unlimited undo/redo is supported (Ctrl+Z / Ctrl+Y), so you can experiment freely.