Merge Images

Sometimes one photo does not tell the whole story — a before-and-after, a set of product shots, or a handful of screenshots all make more sense side by side. Merge Images was built to combine any number of pictures into a single file in seconds, without installing any software or sending a single file to a server.

What is Merge Images?

Merge Images is a browser-based tool that combines two or more JPG, PNG, WebP or GIF files into a single image — placed side by side, stacked one above another, or arranged automatically in a grid — so a whole set of photos ends up as one shareable file instead of many.

Because everything runs inside your own browser using the HTML5 Canvas API, no file is ever uploaded to a server. You choose your images, arrange and style them, and the whole process happens on your own device — there is no queue, no waiting on a remote server, and no risk of your photos sitting on someone else's storage.

Under the hood, the tool draws each picture onto a single in-memory canvas sized to fit your chosen layout, spacing and alignment, then re-encodes that canvas back into a downloadable file.

When should you use it?

Combining images into one file solves a handful of everyday annoyances that come up whenever more than one picture needs to be viewed or shared together.

• You want a before-and-after comparison as a single image instead of two separate files.
• You have several product photos and need one clean image for a listing or social post.
• A form, chat or email only accepts a single image attachment, but you have more than one to send.
• You took a few screenshots and want them stacked in order as one reference image.
• You want a simple photo grid or collage without opening a full design app.

The benefits

Desktop photo editors can combine images too, but that usually means opening a full application and manually placing each picture. A dedicated online tool keeps things far simpler:

• Drop in as many images as you need and drag them into the exact order you want.
• Choose side-by-side, stacked, or an automatic grid layout in one click.
• Control spacing, alignment and background color so the result looks clean either way.
• Nothing leaves your device, so private photos and documents stay private throughout.
• Completely free, with no watermark added to your output file.

Supported formats

Merge Images accepts JPG, PNG, WebP and GIF files as input, and you can freely mix formats in the same merge. A JPG output is always flattened onto the background color you choose, since JPG has no transparency. Choosing PNG-style transparent background keeps any gaps between differently sized images see-through instead of filled in.

Common mistakes to avoid

A little care goes a long way when merging images:

• Forgetting to check image order before merging — drag thumbnails into place first, since the download happens instantly.
• Mixing very different image sizes in side-by-side mode without picking a background color, which can leave odd gaps.
• Leaving a sideways photo un-rotated, which looks fine as a thumbnail but reads wrong once merged.
• Choosing grid layout for just two images, when side-by-side or stacked usually looks cleaner.

Tips for best results

A few small habits make the whole process smoother:

• Use side-by-side for comparisons and stacked for a vertical sequence like screenshots.
• Use grid layout once you have four or more images of similar size.
• Pick a background color that matches where the merged image will be used.
• Rotate any sideways photo before merging rather than after — it is much quicker to fix here.
• Keep your original photos in case you want to rebuild the merge later with different settings.