April 15, 2026 · 5 min read
How to Stitch & Merge Images Online (Free, No App Needed)
Want to combine multiple photos into one image — side by side, stacked, or in a grid? Here's how to do it in seconds, for free, right in your browser.
What Is Image Stitching?
Image stitching (also called image merging or collage-making) is the process of combining two or more photos into a single image. The most common use cases include:
- Before/after comparisons — show the difference side by side
- Product detail shots — combine front, back, and close-up into one image
- Panoramic photos — join overlapping images taken from the same spot
- Social media collages — pack multiple moments into one post
- Step-by-step guides — line up screenshots or tutorial images
Step-by-Step: Merge Images Online
- Open the free Image Stitcher. Go to image-backgroundremover.com/stitch. No account needed.
- Upload your images.Drag & drop 2–10 images onto the page (JPG, PNG, or WebP, up to 20 MB each). You can reorder them by dragging the thumbnails.
- Choose a layout. Pick from:
- Horizontal — images placed side by side, left to right
- Vertical — images stacked top to bottom
- Auto Grid — automatically arranged into a balanced grid
- Adjust spacing. Use the gap slider to add or remove space between images. Set the alignment (top, center, or bottom) for horizontal layouts.
- Preview and download. A live preview updates as you adjust settings. Click Download PNG to save the merged image.
Layout Guide: Which One to Use?
| Layout | Best For | Typical Use |
|---|---|---|
| Horizontal | 2–4 images | Before/after, product views |
| Vertical | 3–8 images | Step-by-step guides, screenshots |
| Auto Grid | 4–9 images | Social collages, portfolios |
Tips for Clean Results
- Use images with consistent dimensions for the cleanest alignment
- For before/after shots, set alignment to center so subjects line up
- Add a small gap (8–16 px) between images to give them visual breathing room
- For social media, target a total output width of 1080 px (Instagram) or 1200 px (Twitter)
- If images have white backgrounds, try a white gap color so the join is invisible
Privacy: Does My Data Get Uploaded?
No. The image stitching tool works entirely in your browser using the HTML5 Canvas API. Your photos are never sent to any server — they stay on your device from start to finish. This also means it works offline once the page has loaded.
Frequently Asked Questions
Can I merge more than 2 images?
Yes — you can upload up to 10 images at once. Use Auto Grid for large collections.
What file formats are supported?
JPG, PNG, and WebP are all accepted. The output is always a PNG to preserve quality.
Can I control the output resolution?
The output matches the resolution of your input images. For best results, use the highest-resolution originals you have.
Is there a file size limit?
Each image can be up to 20 MB. Very large images may take a moment to process depending on your device.
Try the Image Stitcher — it's free
Combine photos side by side or in a grid. No sign-up, no watermarks, no limits.
Stitch Images Now →