Merge PNG Files — Combine PNG Images with Transparency

Merge PNG is a free online tool built specifically for combining PNG images while preserving transparency. Upload your PNG files, choose horizontal or vertical layout, and toggle transparency preservation to keep or fill transparent areas — all processing runs locally in your browser.

When transparency preservation is enabled, gaps between images stay transparent — perfect for creating sprite sheets, design composites, or layered graphics. When disabled, gaps fill with a white background for a clean, solid result.

Why Use a Dedicated PNG Merger?

PNG is the go-to format when you need lossless quality and transparency support. Generic image mergers often convert PNGs to JPEG, destroying transparency and introducing compression artifacts. Our dedicated PNG combiner ensures the output is always a PNG file with full alpha-channel support.

This matters for designers working with logos, icons, UI elements, or any graphics that require transparent backgrounds. The merged output retains all transparency data, so you can layer the combined image onto any background without white rectangles or jagged edges.

Key Features

• Transparency toggle — Choose whether gaps and backgrounds stay transparent or fill with white.
• Forced PNG output — The merged result is always a PNG file, even if you upload JPG or WebP images.
• Checkerboard preview — See exactly where transparent areas are with a visual checkerboard pattern.
• Lossless quality — No compression artifacts. Every pixel is preserved exactly as uploaded.
• Batch support — Merge up to 20 PNG images at once with drag-to-reorder.

Common Use Cases for PNG Merging

• Sprite sheets — Combine individual game or UI icons into a single sprite sheet for web development.
• Logo compilations — Merge multiple brand logos side by side for partner pages or sponsorship graphics.
• Design mockups — Combine UI screenshots or wireframe elements into presentation-ready images.
• Sticker sheets — Arrange sticker or emoji designs in a grid with transparent backgrounds.
• Print-ready graphics — Merge high-quality artwork without compression loss for printing.

Need a grayscale converter? Convert your images before merging them into a single PNG. Need JPEG output with file size control? Try our JPG merger. For more layout options including grid mode, use the Image Merger. You can also overlay images with adjustable opacity, or compare two photos side by side.