unbg

Remove Image Backgrounds Instantly & for Free

Visit Website
100%
Processing
Runs entirely in the browser - zero server uploads
$0
Cost
Completely free with no limits or watermarks
Total
Privacy
Images never leave the user's device
unbg - Image 1
unbg - Image 2
unbg - Image 3

About This Solution

unbg is a free, privacy-first background removal tool powered by AI that runs entirely in the user's browser. Unlike cloud-based alternatives like remove.bg, unbg never uploads images to any server - all processing happens locally using an ONNX neural network model. It supports batch processing, a before/after comparison slider, manual brush editing (erase & restore), and high-resolution PNG downloads. Built with Next.js 16 and React 19, it delivers a premium, responsive experience on desktop and mobile.

The Challenge

Existing background removal tools like remove.bg require uploading images to external servers, raising privacy concerns. Free tiers are heavily limited - low resolution, watermarks, or daily caps. Mobile users face additional friction with unsupported formats (HEIC) and poor touch experiences. Businesses and individuals needed a truly free, private, and unlimited solution.

Our Solution

We built unbg to run AI background removal entirely in the browser using WebAssembly and the ONNX Runtime. The AI model downloads once (~80MB) and is cached for instant subsequent use. Images never leave the device, guaranteeing complete privacy. We added a full editing suite with a comparison slider and brush tools for manual refinement, batch processing for efficiency, and universal mobile support including automatic HEIC conversion.

Key Features

  • ✓100% browser-based - no server uploads
  • ✓AI-powered precision with ONNX neural network
  • ✓Free forever with no watermarks or limits
  • ✓Batch processing for multiple images
  • ✓Before/after comparison slider
  • ✓Manual erase & restore brush editor
  • ✓Mobile-first responsive design
  • ✓PWA-ready with offline model caching

Technologies

Next.jsReactTypeScriptTailwind CSS@imgly/background-removalONNX Runtime WebWebAssemblyCanvas APIVercel

Core Functionalities

✓AI-powered background removal running locally in the browser
✓Batch processing - upload and process multiple images at once
✓Before/after comparison slider with reveal animation
✓Manual brush editor with erase and restore modes
✓Adjustable brush size for fine-tuning results
✓High-resolution transparent PNG downloads
✓Batch download all processed images
✓Drag-and-drop and gallery upload support
✓Mobile-optimized with full touch support
✓HEIC/HEIF auto-conversion for mobile gallery photos

Results & Impact

✓Eliminated all server-side image processing - 100% client-side
✓Zero cost to users - no subscriptions, credits, or watermarks
✓Full-resolution output with no quality degradation
✓Reduced background removal workflow from minutes to seconds
✓Universal mobile compatibility across all browsers and devices
✓Complete user privacy - images never transmitted over the network

Ready to Build Your Own Solution?

Let's create something amazing together. Contact us to discuss your project.

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