Photo Mosaic Generator - Online Tile a Big Picture from Small

A photo mosaic divides an image into a grid of small tiles, each filled with the average color of that section. This creates a pixel-art-like effect that becomes more detailed with smaller tiles and more abstract with larger ones. Our tool processes everything locally in your browser using HTML5 Canvas — no uploads to any server, ensuring your images remain private and secure.

It depends on your creative goal. For a detailed pixel-art look, use 4–8px tiles. For a balanced mosaic effect where shapes are still recognizable, 12–16px works well. For an abstract, modern art style, try 32–64px tiles. Larger tile sizes create bold, geometric compositions that work beautifully as wall art or social media graphics. You can adjust the slider in real-time to preview different styles instantly.

We offer three tile shapes: Square (classic mosaic, seamless coverage), Circle (creates a dotted, pointillism-style effect with small gaps between tiles), and Diamond (geometric, quilt-like pattern). Square tiles provide the cleanest mosaic look. Circle tiles add an artistic, soft texture ideal for portraits. Diamond tiles give a unique crystalline appearance perfect for abstract compositions.

Grid lines add visible borders between each tile, emphasizing the mosaic structure. You can customize the grid color (white, black, or any color via the picker) and line width (1–4px). White grid lines on darker images create a striking stained-glass effect. Dark grids on bright images add definition. Grid lines are optional and can be toggled on/off at any time without losing your settings.

Yes! The download exports your mosaic as a PNG file at the full processing resolution (up to 1200px on the longest side). PNG format preserves every detail with lossless quality, making it ideal for printing, sharing on social media, or using in design projects. The download button appears once an image is loaded and processed.

Absolutely. Use the "Show Original Image" toggle above the preview to instantly switch between your mosaic and the original photo. This side-by-side comparison helps you fine-tune tile size, shape, and grid settings to achieve exactly the look you want before downloading.

Yes, the Photo Mosaic Generator is fully responsive and works on smartphones and tablets. You can upload images from your camera roll, adjust settings with touch-friendly sliders, preview the mosaic, and download the result — all from your mobile browser. The interface adapts to smaller screens for a smooth experience.

No uploads ever happen. All image processing is done entirely within your browser using JavaScript and the HTML5 Canvas API. Your photos never leave your device. This ensures complete privacy and security. The tool works offline too — once the page is loaded, no internet connection is needed.

The tool supports JPG, PNG, WebP, and GIF formats for upload. You can also paste an image URL to load directly from the web (CORS restrictions may apply for some URLs). For animated GIFs, only the first frame is processed as a static image. The output is always PNG.

Photo mosaics are incredibly versatile. Use them to create unique social media profile pictures, generate pixel-art style wallpapers, design abstract art prints for home decor, make custom gifts with a retro gaming aesthetic, censor sensitive parts of images creatively, or produce geometric branding elements. The combination of tile size, shape, and grid settings gives you endless artistic possibilities.