Merge photos side by side
Choose Horizontal to combine two or more photos in one row. Reorder the images by dragging them before you export.
Private · Browser-based · No watermark
Merge Images Online
Merge two or more images into one. Combine photos side by side, vertically or in a grid with size matching, spacing and alignment.
Horizontal · Vertical · Grid
Images 0
Drag images to reorder them.
Preview—
Rendering…
Merge screenshots vertically
Choose Vertical to join long screenshots, chat captures, receipts or tutorial steps into one continuous image.
Create a picture grid
Grid mode arranges photos into multiple columns. Adjust spacing and the background, then export as PNG, JPG or WebP.
How to use Merge Images Online
- 1
Add two or more images
Choose, drag or paste the images you want to combine and put them in the right order.
- 2
Choose the merge layout
Pick Horizontal, Vertical or Grid, then adjust size matching, alignment, gap, border, radius and background.
- 3
Preview and export
Check the final canvas, then download it as PNG, JPG or WebP or copy the result when supported.
About Merge Images Online
Merge images horizontally, vertically, or in a grid. You can reorder files, change spacing and background, preview the canvas, and export as PNG, JPG, or WebP.
Frequently asked questions
Will merging upload, change, or overwrite my original images?
No. ViewerPix reads images and creates a preview in the current browser, then creates a new merged image only when you download or copy it. It does not overwrite, resize, compress, or change the original files; an un-downloaded result is lost when you refresh, close, or reset the page.
How many images can I merge, and how is their order chosen?
Add at least two images. The order in the source list is the output order: left to right for Horizontal, top to bottom for Vertical, and left to right before the next row for Grid. Drag items or use the move controls to reorder them.
When should I use Horizontal, Vertical, or Grid?
Horizontal works for comparisons and side-by-side screenshots. Vertical works for conversations, receipts, web captures, and step-by-step images. Grid works for several photos or product images; it follows the list order and is not a freeform collage canvas.
Can I merge portrait and landscape images with different sizes?
Yes. With Original size, every image keeps its pixels without scaling or cropping. Horizontal uses the tallest image and Vertical uses the widest; uncovered space around smaller images uses the background or transparency, according to the alignment settings.
What is the difference between matching height, matching width, and crop to match?
Matching height and width scale proportionally, so they do not stretch or crop images. Crop to match center-crops images to fill uniform frames; it makes a tidier layout but can remove faces, text, QR codes, or edge details, so check the preview.
How do I make a long screenshot from images with different widths?
Choose Vertical, Match width, and a 0 px gap, then put images in reading order. ViewerPix places complete images in sequence; it does not detect overlapping content, remove duplicates, find seamless joins, or repair images. Crop overlaps before merging.
What do gap, background, border, and rounded corners affect? Can the output be transparent?
Gap sets space between images, background fills gaps and unused canvas, and border and rounded corners apply to each source image. You can enable transparent background; then the background color is ignored and JPG changes to PNG because JPG cannot store transparency.
Which output format should I use, and what does Copy result do?
PNG suits transparent images, screenshots, text, and later editing. JPG suits ordinary photos but cannot be transparent. WebP balances size and quality and supports transparency. The JPG and WebP quality setting applies on download; Copy result always puts a PNG on the clipboard.
Why can a preview, download, or merge fail?
The browser can reject a source above 100 MB or with too many pixels. A merged canvas cannot safely exceed 32,767 px on either side or 120 million pixels in total. ViewerPix attempts common HEIC, HEIF, and TIFF variants, but not every encoding opens; multi-page TIFF currently uses the first page.
Are my images uploaded to a server?
No. Supported image processing runs locally in your browser. Third-party decoder code may be loaded only when a format needs it, but your image itself stays on your device.
Private browser processing
ViewerPix processes supported images on your device. Your image files are not uploaded to a ViewerPix application server for this task.