Best AI to colorize black and white photos in bulk on Windows 10?

To colorize black and white photos on a Windows 10 computer. AlterPhoto is a completely free photo editor for Windows that's packed with features — including a dedicated Coloriza tion tool designed specifically for black and white photos. It's been around for a few years now, with the latest version (3.3) released in April 2026, so it's actively maintained.

Most free coloriza tion tools fall into two categories: either they're web-based (which means uploading your photos to someone's server) or they're single-purpose apps that do one thing and one thing only.

AlterPhoto is different. It's a full-featured photo editor that happens to include black-and-white coloriza tion as one of its many tools. Here's you can colorize black and white photos:

Coloriza tion-specific tools:

• A dedicated Coloriza tion feature for black and white photos
• Color balance adjustment by range
• Color change by range or picked color (manual control when the AI gets it wrong)
• Color curve and levels for precise adjustments
• Color presets for quick, one-click results
• Auto-enhancement that can help balance the final image

Additional editing power:

• Support for layers 
• Healing, cloning, smudging, and blurring tools for retouching
• Over 100 file formats supported, including RAW imports
• Filters for denoising, smoothing, sharpening, and more
• Generative AI features