Batch-Background-Remover-Tool

Batch-Background-Remover-Tool

ℹ️ What this tool does & how to use it (click to collapse)

This is a fully offline, browser-based batch tool for removing backgrounds from multiple images at once. No images or data ever leave your computer — everything runs locally in this page.

1. Loading images

• Click the file picker and select one or more images. Each image becomes a separate job in the batch.
• All loaded jobs appear as scrollable thumbnails on the left. Click a thumbnail to make it the active image in the editor.

2. Background removal methods

• Flood Fill — the only method that actually runs in-browser. A contiguous color-distance fill, similar to Krita's "Contiguous Selection" tool.
• Rembg / HoneyClean / CarveKit — real AI tools, but they need a local Python/GPU server. They are listed for reference; selecting them shows a notice and the app falls back to Flood Fill.
• Removerized — a separate offline browser app, not embeddable here as a library. Same fallback applies.

3. Selecting the background

• Magic Wand — click anywhere on the image. It flood-fills all connected pixels within the Tolerance slider's color distance, selecting them (shown as a tinted overlay).
• Tolerance — higher values select a wider range of similar colors in one click.
• Brush Add / Brush Subtract — drag with the mouse to manually add or remove pixels from the current selection. Adjust Brush size as needed.
• Clear Selection — deselects everything on the active image without changing pixels.

4. Black Line Drawing (selection barrier)

• Pick the Black Line Drawing tool, set Line width, then click-drag-release to draw a straight black line on the image.
• The line is drawn permanently into the pixels AND marked as a barrier: Magic Wand and Auto Remove will never flood-fill across it, even if colors would otherwise match.
• Useful for separating a background region from a foreground object that touches it.
• Clear Black Lines removes the flood-fill barrier; use Undo to also remove the black pixels themselves.

5. Removing the background

• Delete (cut selection) — makes the current selection on the active image transparent.
• Auto Remove all Background — runs automatically on every loaded image in the batch: it seeds flood-fill from each image's corners/edges using the current Tolerance, then deletes the result. Fast offline approximation, not full AI segmentation — best for flat or near-flat backgrounds. Use Magic Wand/Brush/Black Line afterward to clean up complex cases.

6. Undo / Redo / Keyboard shortcuts

• Undo / Redo step through every pixel-changing action (delete, line draw) per image, independently for each job.
• Keyboard: Delete/Backspace = cut selection, Ctrl+Z = undo, Ctrl+Y = redo.

7. Exporting results

• Export PNG — downloads the currently active image only, with transparency.
• Export All (sequential downloads) — downloads every image in the batch one by one as separate PNG files.
• Export All as ZIP — packs every processed image into a single batch_background_removed.zip file, built locally with no external library.