Image Joiner

Combining pictures into one file is handy for before-and-after comparisons, screenshots of a conversation, product variations, collages or long infographics. Fileopia’s image joiner stitches any number of images horizontally, vertically or into a grid, scales them to line up neatly, adds optional spacing and a background colour, and saves the result as JPG, PNG or WebP. Images are combined locally in your browser, so private screenshots stay private.

Common uses

• Make before-and-after or side-by-side comparison images.
• Stitch several chat screenshots into one tall image.
• Combine product photos or colour variants into one listing image.
• Build a simple photo collage or contact sheet in a grid.
• Join scanned pages or receipts into one picture to share.

Tips for best results

• Use vertical layout for screenshots of long conversations or articles.
• A small gap (8–20 px) with a white background looks clean on social media.
• Choose PNG for screenshots and text, JPG for photos.
• Lower the maximum size if the result is too large to upload.
• Reorder images before joining – the order you see is the order used.

Layouts explained

Side by side places images in one row; with “Match sizes” every image is scaled to the same height so tops and bottoms align. Top to bottom stacks them in one column at a shared width – ideal for screenshots. Grid arranges them in rows with the number of columns you choose, scaling each to a uniform cell; any empty cells at the end are filled with the background colour. Gaps are added between images and around nothing else.

Keeping quality high

Images are drawn once onto a single canvas at the target size, so there is no repeated compression. If the combined size exceeds the maximum you selected, everything is scaled down proportionally in one step. For the sharpest result keep the maximum at 4000 pixels or above and choose PNG. Very large canvases above 16,000 pixels can exceed browser memory on phones, so use them only when necessary.

Joining versus making a PDF

A single joined image is easiest to send in chats and post on social media. If you are combining documents, receipts or many pages for printing, a PDF is usually better: pages stay separate, text stays sharp and file size is smaller. Use the image to PDF converter on this site for that – it uses the same private, in-browser approach.