Combine multiple images into one long vertical image. Perfect for mobile-first content and step-by-step guides.
Vertical merging lets you stack multiple images on top of each other to create one “long image.” This method is widely used in tutorials, product list visuals, multi-image before/after flows, and social media story series. Instead of sharing separate images, you deliver everything in a single continuous visual, which creates a smoother reading experience and strengthens content consistency.
It’s especially powerful for mobile users: they can scroll from top to bottom and consume all steps in one flow. This makes tutorials, product guides, and list-style posts much more effective and reduces confusion.
Additionally, support teams can use it for troubleshooting steps, software teams for bug-report screenshot sequences, and social media teams for “one long guide instead of a carousel.”
The most important factor in vertical merging is keeping widths consistent. If widths vary, the composition looks messy. So it’s usually best to normalize images to a standard width (e.g., 1080px) before merging. Adding a small gap prevents images from sticking together and improves readability.
Another key practice is consistent alignment. Keep everything centered, for example. Mixed left-aligned and centered images look amateur. For gaps, the 8–24px range often feels premium. Bigger gaps create a stronger “section/slide” feeling.
If you’re merging many images, you can create a better reading flow with simple structure: equal spacing between steps, and optionally thin dividers or step labels. This prevents the long image from feeling like one giant wall and makes it easier to follow.
Since the process runs in the browser, it’s fast and privacy-friendly, but very large images may stress devices. The best workflow is: build layout in Preview Mode, then export full quality with Export Mode. For web use, WebP usually offers the best quality/size balance.
If you’ll use the result on the web, setting a target width (e.g., 1080–1600px) keeps file size under control. A light compression after export can significantly speed up mobile loading.
Tip: After vertical merging, finalize your target width using “Resize,” then reduce file size using “Compress.” This creates a more professional look and faster loading.
Merge multiple photos vertically for free. Adjust gap, padding and background, then download one image. Browser-based — no upload. Related tools: Merge vertically, Side by side, Collage, Stack.