Does merging PNG images preserve transparency?

Yes! When merging PNG files, the background remains transparent by default so you can place the merged graphic over any background without white or black boxes.

How do I combine PNG images side by side?

Select 'Horizontal' under the Layout option. The images will automatically be aligned and stitched side-by-side with matched heights.

Is my data private and secure?

Yes, 100% private. All processing takes place locally inside your browser with HTML5 Canvas. No image files are ever uploaded to any server.

Unir imágenes PNG en línea

Une múltiples gráficos PNG en una sola imagen conservando la transparencia alfa original.

Layout:

Spacing (px):

Background:

Choose PNG images or drag & drop

Alpha transparency preserved • Lossless quality • No uploads

Merged PNG Preview

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Direct Answer: How can you merge PNG images while keeping transparency?

Use an in-browser alpha-aware canvas merger. Unlike standard image tools that force a solid white background, PhotoQuill preserves 32-bit RGBA channels throughout composition. Multiple transparent PNGs are stitched together seamlessly without converting alpha pixels to solid color blocks.

Why Merge PNG Images with PhotoQuill?

Alpha Transparency Maintained

Transparent backgrounds in your stickers, logos, icons, and product cutouts remain fully transparent without background discoloration.

Private Local Execution

No confidential artwork is sent over the network. Every operation is executed inside your browser using client-side WebAssembly and Canvas.

Lossless Precision

Pixel-perfect rendering without artifact generation or quality downsampling, perfect for web assets and game sprites.

Merging PNG vs. Merging JPG Matrix

Comparison Factor	Merge PNG	Merge JPG
Alpha Transparency	Supported (Full 8-bit Alpha)	No (Replaced by solid color)
Compression Type	Lossless Deflate (Zero degradation)	Lossy DCT (Higher file compression)
Ideal Scenarios	App icons, UI mockups, logos, game sprites	Photography, real-estate photos, scans
Output File Size	Moderate to large (Preserves crisp edges)	Small to compact (Optimized for web photos)

PhotoQuill Local vs. Cloud Combiners

Evaluation Metric	PhotoQuill Web-Native Tool	Traditional Cloud Merger
Data Privacy	100% On-Device (Zero Uploads)	Uploaded to Remote Server
Memory & Resolution Limit	Up to 8K/16K (Device RAM)	Often capped at 10MB or 2048px
Registration / Fees	Free, No Sign-up	Often requires account or premium tier