Image Joiner
Arrange multiple images vertically or horizontally and save one comparison image.
Multiple selection is supported. Images never leave your browser.
About this tool
Join multiple JPEG, PNG, and WebP images vertically or horizontally entirely in your browser. Control order, spacing, background color, and alignment, then download one PNG or JPEG for before-and-after or comparison layouts.
For a horizontal join, images are scaled proportionally to the shortest image height. For a vertical join, they are scaled to the narrowest width. Images are reduced, not stretched, to create a consistent comparison.
Spacing is inserted only between images. Alignment controls vertical placement in a horizontal join and horizontal placement in a vertical join. Transparent areas and unused space use the selected background color.
Images are processed in your browser and never uploaded. Each source is limited to 4,096 pixels on its longest side, and a joined result longer than 8,192 pixels is scaled down before saving.
FAQ
- Are images uploaded?
- No. Loading, joining, and saving all happen inside your browser.
- How many images can be joined?
- There is no fixed count limit, but processing uses device memory, so start with a few images at a time.
- Can I change the image order?
- Yes. Use the up and down buttons in the file list before creating the result.
- What happens when images have different sizes?
- Aspect ratios are preserved. Horizontal joins normalize height, while vertical joins normalize width.
Everything you enter is processed in your browser and never sent anywhere.