What if my images have different sizes?

They are kept at their native resolution and aligned to the shared edge — the top edge for horizontal combining, the left edge for vertical. The canvas is sized to the largest image in the cross direction, and any leftover area (plus the gaps) is filled with white. For flush, even edges, run the images through the Resize tool first to a common height (horizontal) or width (vertical).

Does the order matter, and can I change it?

Images are placed in the order shown in the file list, which is the order you added them. To change it, remove a file with the X button and add it again in the position you want — adding files appends them to the end of the list.

Can I make a grid instead of a single row or column?

Not in one pass, but two passes work: combine each row horizontally first, download the rows, then combine the row images vertically. The intermediate files are PNG, so there's no quality loss from the extra step.

Why is the output PNG, and what happens to transparency?

PNG keeps every input pixel exactly as it was, whether the sources were JPG, PNG, or WebP. The canvas background is white, so transparent regions in source images are flattened onto white. If the combined image is large, the Compress Image or Convert tool can bring the file size down afterwards.

Combine Images

Stitch multiple images together horizontally or vertically.

Drop image files here or browse

Max 50MB per file · Up to 20 files

About Combine Images

Combining multiple images into one file — side by side for a before/after comparison, or stacked vertically into a single tall image — saves you from sending five attachments when one would do. Convertora's combine tool stitches 2 to 20 images together in the order you add them, horizontally or vertically, with an optional gap between them, and outputs a single PNG.

The stitching happens on a canvas in your browser: each image is drawn at full resolution onto one large surface, nothing is scaled or recompressed along the way, and the file is assembled locally without any upload. That makes it equally suitable for quick screenshot collages and for documents you wouldn't put on a third-party server.

How to use it

1Upload 2 to 20 images — JPG, PNG, WebP, or AVIF, up to 50 MB each. They are combined in the order they appear in the file list.
2Choose a direction: Horizontal places images left to right; Vertical stacks them top to bottom.
3Optionally set a gap of up to 50 pixels between images — useful for visually separating screenshots.
4Click Combine. The canvas is sized to fit everything (the sum of widths for horizontal, the sum of heights for vertical), and the result downloads as combined-image.png.

Common use cases

Building a before/after pair from two screenshots for a bug report or design review.
Stitching sequential screenshots of a long page or chat thread into one continuous vertical image.
Combining several photos into a single attachment for a listing or insurance claim.
Assembling step-by-step instruction frames into one image for documentation.

Frequently asked questions

Tips

Resize all images to the same height before a horizontal combine (or the same width before a vertical one) — mixed sizes leave white blocks where the smaller images end.
A small gap of 5-10 px makes multi-screenshot composites much easier to read than butting images directly against each other.

100% private — runs in your browser

Convertora processes everything on your device using JavaScript and WebAssembly. Files never leave your browser, are never uploaded to a server, and are never seen by us or anyone else. The moment you close the tab, the data is gone — there is no temporary cloud copy, no log entry, no retained backup.

Because the work happens locally, processing speed depends on your device — but there are no rate limits, no daily caps, and no file size restrictions beyond what your browser can handle in memory. No signup, no account, no payment. The tool works the same in incognito mode, on a corporate network, or after the page has loaded once, even with the network disconnected.