Image Combiner - Merge Multiple Images Instantly
Combine multiple images into one with horizontal, vertical, or grid layouts. Custom spacing, backgrounds, and export options. No watermarks, no signup.
How it works
100% private - all processing happens in your browser.
Drag & drop images
or click to browse your files
Supported formats: PNG, JPG, WebP
Maximum: 20 images, 20MB per image
Why Use an Image Combiner?
Comparison Charts
Place images side by side for before/after shots, product comparisons, or A/B testing visuals
Photo Collages
Create beautiful image grids for social media posts, portfolios, or mood boards
Step-by-Step Guides
Combine screenshots or diagrams vertically to create visual tutorials and documentation
100% Private
All processing happens in your browser using Canvas API. Your images never leave your device
Layout Options
Horizontal
Images placed side by side, scaled to matching height
Vertical
Images stacked top to bottom, scaled to matching width
Grid
Images arranged in a configurable 2-4 column grid
Common Use Cases
- • Before/after comparison images for real estate, fitness, or design projects
- • Product collages for e-commerce listings or social media
- • Multi-image social media posts (Instagram carousels, Pinterest pins)
- • Combining screenshots for bug reports or documentation
- • Creating mood boards and visual inspiration collections
How the Image Combiner Works
Everything happens in your browser. When you add images, each one is decoded and drawn onto an HTML5 canvas in the order you arrange them (drag the thumbnails to reorder). The canvas is exported directly to a downloadable file, so your photos are never uploaded to a server. That keeps private images private and makes the whole process instant, with the preview updating live as you change any setting.
The three resize modes control how images of different dimensions are reconciled so the result lines up cleanly. Fit scales each image to a shared size without cropping, preserving the full picture (any leftover space shows the background colour). Fill scales and crops each image to completely cover its slot, which is best when you want a seamless collage with no gaps but can trim the edges of a photo. Original keeps every image at its native pixel size and simply centres them, which is ideal when the images already match or you need pixel-perfect output.
You can add up to 20 images, each up to 20 MB, and the combined canvas can reach 16,384 pixels on a side. Spacing (0-50 px) inserts gutters between images in the background colour, border radius (0-20 px) rounds each image's corners, and in grid mode you can set 2-4 columns and lock every cell to a 1:1, 4:3, or 16:9 aspect ratio for a perfectly even layout.
Export as PNG, JPEG, or WebP. PNG is lossless and supports transparency, so choose it when quality matters or your background is transparent. JPEG produces the smallest files for photo-heavy collages, and WebP strikes a balance with strong compression plus transparency support. For JPEG and WebP a quality slider lets you trade file size against sharpness.
Frequently Asked Questions
Are my images uploaded to a server?
No. The image combiner runs entirely in your browser using the HTML5 Canvas API. Your photos are decoded, arranged, and exported locally, so they never leave your device. This keeps private images private and makes the tool instant with no upload wait.
How many images can I combine and how large can they be?
You can add up to 20 images at once, each up to 20 MB, in PNG, JPG, or WebP format. The combined canvas can reach 16,384 pixels on its longest side, which is plenty for high-resolution collages and print-ready comparisons.
What is the difference between the Fit, Fill, and Original resize modes?
Fit scales each image to a shared size without cropping, so the whole picture is visible and any gaps show the background colour. Fill scales and crops each image to completely cover its slot for a seamless, gap-free collage. Original keeps every image at its native pixel size and centres it, which is best when images already match.
Which output format should I choose?
Use PNG for lossless quality or a transparent background. Choose JPEG for the smallest file size on photo-heavy collages. WebP balances the two with strong compression plus transparency support. For JPEG and WebP, a quality slider lets you trade file size against sharpness.
Can I reorder the images before combining them?
Yes. Drag the numbered thumbnails into any order and the preview updates instantly. The final combined image follows the order shown, so you can fine-tune before/after sequences, carousels, or step-by-step guides exactly how you want them.
How do I make an even grid collage?
Select the Grid layout, then pick 2, 3, or 4 columns and optionally lock the cell aspect ratio to 1:1, 4:3, or 16:9. Combined with the Fill resize mode, this crops every image to identical cells for a perfectly uniform grid, ideal for Instagram carousels and mood boards.
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