Image Joiner

How to use

1. 1Drop your images onto the drop zone or click to pick files. PNG, JPG, WebP, BMP, and GIF are accepted, up to 30 images per join and 25 MB per file.
2. 2Pick a layout: Horizontal lays images side by side left to right, Vertical stacks them top to bottom, or Grid arranges them into a chosen number of columns with rows filling automatically.
3. 3Choose a Sizing mode. Match sizes scales every image so the join axis lines up without gutters; Keep originals draws each image at its true pixel size and lets you align smaller images Start, Center, or End inside their row, column, or cell.
4. 4Set the gap between images (0 px for a seamless stitch, 4 to 16 px for a clean grid look, 32 px or more for a framed collage) and the background color, or enable Transparent background for PNG or WebP output.
5. 5Reorder images with the Up and Down buttons on each card so the joined result follows the sequence you want. Remove any image with the Remove button.
6. 6Pick an output format: PNG for a lossless result, JPG for the smallest file, or WebP for a strong balance. Adjust the quality slider for JPG and WebP, then click Join images. Download the result with Download joined image, or tweak any setting and click Re-render with current settings.

About this tool

Image Joiner combines two or more images into a single, downloadable image entirely in your browser. Drop the images you want to merge, pick a layout (Horizontal lays them side by side, Vertical stacks them top to bottom, Grid fills a fixed number of columns left to right), then fine-tune the result with a gap in pixels, a background color, an output format, and a quality slider for JPG and WebP. The Sizing toggle handles the most common pain point when joining real-world images: pick Match sizes to scale every image so the join axis lines up (every image becomes the same height in Horizontal, the same width in Vertical, and the same column width in Grid), or pick Keep originals to draw each image at its real pixel size and choose how smaller images align inside the row, column, or grid cell (Start, Center, or End). The background can be any 6-digit hex color (with quick presets for white, black, light gray, dark gray, the site's navy, and warm cream) or fully transparent for PNG and WebP output. The predicted output dimensions update live, so you can confirm the joined canvas will fit your target before rendering. Rendering is one drawImage call per source into a single HTMLCanvasElement, so the output is at full resolution (up to a per-side ceiling of 16,000 px to keep the browser stable) and never re-encodes images that do not need it: PNG output is lossless, JPG and WebP use the quality you choose. Useful for joining long screenshots into one image for documentation, building before / after photo comparisons, creating photo collages and mood boards, putting product shots side by side for a listing, stitching chat captures vertically into a single scrollable transcript, and combining step-by-step UI screenshots into a single image for a slide or a tutorial. Everything runs locally, so the photos, screenshots, and product images you join here never leave your device.

Free to use. Works in your browser. No signup, no login.