🎨 Stained Glass Portrait Generator

Upload a photo and turn it into a mosaic of colorful polygons with black outlines — Tiffany style. Fully free, private, and browser-based.

🐕 Upload an image to start

📤 Click or drop your photo

JPG, PNG, WebP

📸 Quick gallery (click to try)

Number of cells 300

Line thickness 2 px

Show black outlines

White background

Before / After slider

Processed locally. No data sent anywhere.

Frequently Asked Questions

How does the stained glass generator work?

Upload a photo. The tool divides it into hundreds of polygonal cells using a Voronoi diagram, fills each cell with the dominant color, and adds black outlines to mimic lead joints.

Can I adjust the level of detail?

Yes, the "Number of cells" slider controls the mesh density. More cells give finer detail. Line thickness is also adjustable.

Is my image private?

Absolutely. Everything runs in your browser. No image is ever uploaded to a server.

What download format is available?

You can download the result as a high-resolution PNG.