Image Merger
ImageCombine multiple images into one with a custom layout, gap and background. Lay images out in a row, a column or a grid and preview the result first in one.
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About Image Merger
This image merger combines multiple images into one using the Canvas 2D API locally in your browser, so nothing is ever uploaded. It supports horizontal and vertical layouts with customizable spacing (in pixels) and background fill color (HEX/RGB, including alpha). The tool auto-detects each image's dimensions and calculates a total canvas size, aligning images to an equal width or equal height as needed. A practical detail worth noting: when sizes differ, a horizontal merge aligns to the tallest image's height and a vertical merge to the widest image's width, with leftover gaps filled by the background color — which is why stitching screenshots of different widths can leave solid-color strips. To keep a long screenshot seamless, normalize widths before merging. Input accepts PNG, JPEG and WebP; output defaults to PNG to preserve a transparent background, or choose WebP for a smaller file. This is handy for long scroll images, side-by-side comparisons, collage art and product showcase layouts, all without opening heavyweight image software.
How to Use
- Open the Image Merger tool
- Upload the image file
- Adjust the output options as needed
- Click the Process button; results appear in real time
- Copy or export the result
Use Cases
- Long image creation — Vertically merge multiple screenshots or photos into a long image for one-click social media sharing of complete content.
- Product comparison — Horizontally arrange multiple product images for before-after or same-category side-by-side comparison displays.
- Collage making — Merge multiple photos into a collage with custom spacing and background color for personalized layouts.
- Screenshot stitching — Merge multi-segment screenshots of long web pages into a complete long image preserving full page content.
- Comic strip frames — Sequentially merge comic panel images into a vertical or horizontal continuous-reading comic strip.
FAQ
Does it support both horizontal and vertical merging?
Yes. Choose horizontal (left to right) or vertical (top to bottom) layout; canvas dimensions are auto-calculated.
What if image sizes differ?
Images are auto-aligned: horizontal merge aligns to the tallest height, vertical to the widest width; gaps fill with the background color. Normalize widths for seamless long screenshots.
Can I set image spacing?
Yes. Customize spacing in pixels and set background fill color (including transparent); spacing areas show the background color.
Can I add many images at once?
Yes, drag in multiple images. Keep in mind browser memory is limited, so very large or high-resolution batches may benefit from being processed in smaller groups.
Does merging lose image quality?
No. Merging simply places each source image on a shared canvas and draws it pixel-for-pixel without resampling, so clarity matches each original.
Are images uploaded?
No. All merging runs locally in your browser via Canvas drawImage, so your images never leave your device.