Image Merger Online – Combine Images Horizontally or Vertically

How to Use Image Merger

Step 1: Select or drop multiple images (JPG, PNG, WEBP) into the merger workspace.
Step 2: Choose your layout orientation: Horizontal (side-by-side), Vertical (stacked), or 2x2 Grid.
Step 3: Reorder images using the drag handles or arrow controls.
Step 4: Adjust border spacing and background color, then download your combined image.

One Resizer's Image Merger provides specialized browser-local controls tailored to its workflow:

Layout Modes: Arrange images in a Horizontal row, Vertical column, or 2x2 multi-image grid.
Border Spacing & Gap Slider: Add custom pixel gaps between images for clean separation.
Background Color Picker: Fill border gaps with solid white, black, or custom accent colors.
Reorder Controls: Move images up or down to set the exact visual sequence.

Specification	Technical Capability
Accepted Input Formats	Multiple JPG, JPEG, PNG, WEBP
Output File Formats	JPG, PNG, WEBP
Processing Engine	Client-Side HTML5 Canvas Multi-Draw
Network Privacy	Local browser processing (0 bytes uploaded)

For before-and-after comparisons, choose the Horizontal side-by-side layout.
For social media comparison posts, use a 2x2 grid with a 10px white border gap.
Ensure input images have similar aspect ratios for the cleanest grid alignments.

Images have unequal heights in horizontal mode: The tool automatically scales heights proportionally to maintain uniform alignment across the canvas.
Output file size is large: Merging high-resolution photos produces a large combined canvas; use the quality slider to adjust output byte size.

You can arrange multiple images horizontally in a row, vertically in a column, or in a 2x2 grid layout.

Yes, the gap slider adjusts border spacing between images and lets you pick a custom background fill color.

Yes, use the move up/down controls or drag and drop to reorder images in your desired sequence.