Combine Images Online

Merge multiple photos into one — side by side, stacked, or in a grid. Adjustable gap and background, PNG or JPEG output. Runs in your browser.

How to combine images online

Drop two or more images onto the upload area. Each image appears in the order list — reorder with ↑/↓, remove with the remove button, or drop more images to add. Pick a layout (side by side, stacked, or 2/3/4-column grid), adjust the gap between images and the background color, and click Download. The combined image is rendered to a single Canvas in your browser and exported as PNG or JPEG.

Why a local combiner matters

Combined photos often contain personal moments — family pictures, travel shots, before-and-after wellness photos, work-in-progress mockups. Uploading them to a third-party site for the simple act of arranging them in a grid is both unnecessary and a privacy risk. ToolChop runs entirely in your browser: the images never leave your device, and the output is a single clean file with no watermark or signup wall.

What you can do

Side by side (N×1), stacked (1×N), or 2 / 3 / 4-column grids
Reorder, remove, and add images at any time
Adjustable gap (0–40 px) and background color
PNG (lossless) or JPEG (smaller) output
Preview updates instantly as you change layout or order

Frequently asked questions

How do I combine multiple images into one online for free?

Drop two or more images onto the upload area. Pick a layout — Side by side, Stacked, or a 2/3/4-column grid. Reorder with ↑/↓, drop more to add, and click Download. No account, no upload to a server, no daily limit.

Does ToolChop upload my images?

No. Images are decoded into the browser, drawn onto a single Canvas locally, and exported as a PNG or JPEG Blob — all without leaving your device. There is no upload, no temporary server copy, and no log of what you combined.

What layouts are available?

Side by side (N×1), Stacked (1×N), 2×2 grid, 3×N grid, and 4×N grid. The N-column layouts wrap as you add more images — drop 7 photos into a 3-column grid and you get three rows with one cell empty on the bottom.

How does ToolChop handle images of different sizes?

Each grid cell uses an average-sized canvas region (derived from your input images) and each image is fit inside its cell with aspect ratio preserved (object-fit: contain). Empty space inside the cell takes your chosen background color. For best results, crop or resize images to similar aspects first.

Can I adjust spacing between images?

Yes. The Gap slider controls the pixel spacing between cells and around the border — 0 for flush, 8 for a subtle frame, 40 for poster-style padding. The gap is filled with your chosen background color.

Can I pick a transparent background?

PNG output supports transparency, but the color picker uses a hex color and does not include an alpha slider. Workaround: pick a unique color (e.g. #FF00FF) as the background, then use any image editor to make that color transparent with a single click.

How do I reorder the images?

Each image has ↑ and ↓ buttons in the image list — click to move it earlier or later in the sequence. The preview canvas updates instantly. The order is reading-order: left-to-right, top-to-bottom for grid layouts.

What file formats are supported as input?

Any image your browser can decode: JPG/JPEG, PNG, WebP, GIF (first frame), BMP, AVIF on modern Chrome, HEIC on Safari 17+. The output is PNG (lossless) or JPEG (smaller file size).

Is there a limit on the number of images?

Only your browser's memory. Combining 20 medium-sized photos works without issue in modern Chrome. The bigger limit is the final canvas size — a 10-image side-by-side strip of high-res photos can produce a 20,000-pixel-wide canvas, which some image viewers may struggle to open.

Why is the output PNG so much larger than the input files?

PNG is lossless — it stores every pixel exactly. JPEG inputs that came in at 200 KB each can produce a 5 MB combined PNG because the JPEG compression was discarded when decoding. Pick JPEG output instead if you want a smaller file (at the cost of slight quality loss).

Can I use this for a before-and-after comparison?

Yes — that is one of the most common uses. Drop the 'before' image first, then 'after', pick Side by side, and the combined PNG shows them with a clean gap between. Great for Reddit posts, blog comparisons, or design reviews.

Why use ToolChop instead of a collage maker that uploads my photos?

Privacy and predictability. Many photo collages contain personal moments, family pictures, or work-in-progress assets you would not casually share with a third party. ToolChop runs entirely in your browser so the images never leave your device — and the output is a single deterministic PNG/JPEG with no watermark or signup wall.