Image Background Filler

Workflow & Usage

1. Add images
   Drag & drop or select PNG, WebP, or JPEG files. Images with transparency are detected automatically and previewed instantly.

2. Choose a background style
   Select between:

   • Solid color — pick any color using the color picker or hex input
   • Gradient — choose two colors and a direction (vertical, horizontal, or diagonal)

3. Preview results live
   Each image card shows a stable preview with transparency replaced by your selected background.

4. Fine-tune individual images
   Click Edit on any image to override the global background. The edit modal shows a large, accurate preview before saving.

5. Download your results

   • Download images individually
   • Or export the entire batch as a single ZIP file

What This Tool Is (and Isn’t)

The Image Background Filler replaces transparency — nothing else.

It does:

• Fill transparent pixels with a solid color or gradient
• Preserve original image size and quality
• Work in batch for multiple images
• Support per-image overrides

It does not:

• Remove backgrounds from photos
• Detect objects or edges
• Resize, crop, or pad images
• Use AI or cloud processing

If you need to remove a background, this tool is not the right choice.
If you need to resize or reframe, use the Image Resizer or Image Canvas Adjuster instead.

Use Cases

• Prepare Logos for Any Background
  Replace transparency with white, black, or brand colors before uploading logos to websites, documents, or presentations.

• Social Media & Thumbnails
  Add solid or gradient backgrounds to transparent assets for consistent visuals across platforms.

• Marketing & Branding Assets
  Apply brand gradients behind icons, illustrations, or cutouts without opening a design app.

• E-commerce Images
  Flatten transparent product images to meet marketplace requirements that don’t support transparency.

• Batch Cleanup
  Quickly process folders of transparent images and export them in one clean ZIP.

• Client Deliverables
  Deliver finished assets with predictable backgrounds — no extra instructions needed.

Tips for Best Results

• Use PNG or WebP when transparency matters. These formats preserve alpha channels correctly.
• JPEG images are always flattened. If you upload a JPEG, the background will be solid.
• Gradients work best for marketing visuals. Solid colors are safer for logos and UI assets.
• Use per-image overrides sparingly. Global background settings keep batches consistent.
• Combine with other tools. Add padding or adjust canvas size before filling backgrounds if needed.

How It Works

The Image Background Filler runs entirely in your browser using modern web graphics APIs:

• Images are decoded using createImageBitmap for fast, accurate rendering.
• A canvas is created at the original image size.
• Transparent pixels are filled with your selected color or gradient.
• The original image is drawn on top without scaling or distortion.
• Files are re-encoded locally and exported individually or as a ZIP using JSZip.