Image Stitcher

Image Stitcher joins several pictures into one. Put two photos side by side for a before-and-after, stack a run of phone screenshots into one tall image of a whole conversation or web page, or arrange four product shots in a neat two-by-two grid. Unlike a collage maker, there is no fixed canvas to crop into: every picture keeps its full detail and the result is exactly as big as it needs to be.

You choose the layout, the order, how the pictures line up and whether they are scaled to match each other. A gap, a background colour or a transparent background, and rounded corners give it a finished look. The live preview redraws as you change anything, and the final pixel size is shown before you save.

Big stitches can hit a hidden limit: browsers refuse to draw images beyond a certain size, and Safari is the strictest at about 16.7 million pixels. Instead of failing quietly, this tool warns you and lets you either shrink the result to fit or keep full resolution by splitting a long row or stack into several images. It all happens in your browser, so your pictures are never uploaded.

1. Tap “Choose images”, drop 2 to 20 pictures on the box, or paste them one at a time.
2. Put them in order: drag a card, or use its arrow buttons (Alt + arrow keys work too).
3. Pick a layout: “Side by side”, “Top to bottom”, “Grid, 2 across” or “Grid, 2 rows”, then choose how they line up and whether to match sizes.
4. Add a gap, rounded corners and a background colour if you like, and choose PNG, JPG or WebP.
5. Press “Stitch images”, check the preview, then press “Download image”.

• Four layouts: side by side, top to bottom, a grid two pictures across, or a grid of two rows.
• Full resolution: nothing is cropped, and matching to the smallest picture means nothing is enlarged.
• Match heights (rows) or widths (stacks) to the smallest or largest picture, or keep each picture’s own size.
• Line up top, middle or bottom in a row, or left, centre or right in a stack.
• Gap from 0 to 200 px, optionally round the outside, with any background colour or a transparent one (PNG and WebP).
• Rounded corners on every picture, from 0 to 200 px.
• Save as PNG, JPG or WebP with a quality slider, and see the final pixel size before saving.
• Warns before passing browser canvas limits, then shrinks to fit or splits a long result into parts, downloaded as a ZIP.
• Opens JPG, PNG, WebP, AVIF, GIF, BMP, HEIC, TIFF and SVG.

• For screenshots, choose “Top to bottom” and “Match the smallest”, so text stays crisp and lines up neatly.
• Use PNG for screenshots and graphics; JPG or WebP at quality 85–90 keeps photo stitches much smaller.
• A transparent background only shows in PNG and WebP. JPG has no transparency, so the background colour is used instead.
• Making a before-and-after? Add a 16–24 px gap and a white or dark background so the two halves read as separate pictures.
• If a site rejects a very tall image, split it into parts or run it through Resize Image afterwards.