Is BG-Zero completely free?

Yes, BG-Zero is 100% free to use. There are no watermarks, no file size limits, and no hidden fees. You can remove backgrounds from as many images as you want.

Does BG-Zero upload my images to a server?

No. All AI processing runs locally in your browser using WebAssembly technology. Your images never leave your device, ensuring complete privacy and data security.

Which AI engines does BG-Zero support?

BG-Zero offers three AI engines: imgly (IS-Net model, ~40MB, compatible with all browsers), Transformers.js (RMBG-1.4, ~176MB, best quality, requires WebGPU), and rembg-web (7+ models from 4.7MB, MIT licensed).

Can I use BG-Zero offline?

After the first visit, AI model files are cached in your browser. Subsequent visits can process images even without an internet connection, as long as the model cache hasn't been cleared.

What image formats are supported?

BG-Zero supports JPG, PNG, WebP, and BMP formats. The maximum file size is 25MB. Results are exported as transparent PNG files.

What's the difference between Auto and Manual mode?

Auto mode uses AI to detect and remove backgrounds with one click — perfect for most images. Manual mode lets you pick specific colors with an eyedropper and use Flood Fill for precise removal, with a mask brush to protect areas you want to keep.

Back to Tutorials

How to Remove Image Backgrounds Online for Free — 2026 Complete Guide

From upload to download in three steps. Covering ID photos, e-commerce, design and more.

What Is Background Removal?

Background removal (also called cutout or matting) separates the subject from its background. The subject can then be placed on transparent, solid-color, or custom backgrounds. Widely used for e-commerce products, ID photos, social media, graphic design, and presentations.

Method 1: AI Auto Background Removal (Recommended)

AI auto mode is the fastest and simplest approach. Upload your image, and the AI model detects the subject and removes the background in 3-5 seconds. Perfect for most scenarios, especially images with clear subject-background contrast.

Visit the BG-Zero auto mode page
Upload your image or drag-and-drop
Choose an AI engine (imgly recommended for quick start)
Click 'Start' and wait for AI processing
Preview the result, download transparent PNG

Method 2: Manual Precise Background Removal

When auto mode can't achieve perfect results, manual mode offers pixel-level precision. Use the color picker to select background colors, Flood Fill for precise removal, and mask brush to protect the subject from accidental erasure.

Switch to the manual mode page
Upload image, select 'Pick' tool, click the background
Adjust tolerance slider, click 'Remove'
Use mask brush to protect subject edges
Repeat until satisfied, download result

Three AI Engines Compared

BG-Zero offers three AI engines, each with unique strengths:

imgly (IS-Net) — ~40MB, works in all browsers, great for quick use. Good general-purpose results.
Transformers.js (RMBG-1.4) — ~176MB, requires WebGPU (Chrome 113+). Best quality, especially for complex edges and hair.
rembg-web — From 4.7MB, 7+ models available. Includes portrait-specific (u2net_human_seg), anime-specific (isnet-anime) and more. MIT licensed for commercial use.

Common Use Cases

ID photo background change — remove background, add white/blue/red
E-commerce product photos — create clean white background images
Social media — create collages and memes with removed backgrounds
Presentations — overlay people or objects on slides
Graphic design — isolate elements for compositing and creative projects

Start Removing Backgrounds for Free

No signup required, open and use

Try Auto Background Removal

Method 1: AI Auto Background Removal (Recommended)

Visit the BG-Zero auto mode page

Upload your image or drag-and-drop

Choose an AI engine (imgly recommended for quick start)

Click 'Start' and wait for AI processing

Preview the result, download transparent PNG

Method 2: Manual Precise Background Removal

Switch to the manual mode page

Upload image, select 'Pick' tool, click the background

Adjust tolerance slider, click 'Remove'

Use mask brush to protect subject edges

Repeat until satisfied, download result

Three AI Engines Compared

BG-Zero offers three AI engines, each with unique strengths:

imgly (IS-Net) — ~40MB, works in all browsers, great for quick use. Good general-purpose results.

Transformers.js (RMBG-1.4) — ~176MB, requires WebGPU (Chrome 113+). Best quality, especially for complex edges and hair.

rembg-web — From 4.7MB, 7+ models available. Includes portrait-specific (u2net_human_seg), anime-specific (isnet-anime) and more. MIT licensed for commercial use.

Common Use Cases

ID photo background change — remove background, add white/blue/red

E-commerce product photos — create clean white background images

Social media — create collages and memes with removed backgrounds

Presentations — overlay people or objects on slides

Graphic design — isolate elements for compositing and creative projects