Free browser tool

Image Stitcher

Combine several PNG, JPEG, or WebP images into one file: a horizontal strip, a vertical strip, or a grid. Decoding, layout, and encoding all happen in your browser, so the source images are never uploaded to Bonjourn.

Horizontal strip

Line images up side by side on a shared height, with an optional gap between them.

Vertical strip

Stack images on a shared width for a long screenshot or a step-by-step sequence.

Grid

Arrange images into even cells with a column count, and fit each one by contain or cover.

Build a comparison image that stays readable

  1. 1. Add and order. Reorder or remove images until the sequence reads the way you want it to.
  2. 2. Set spacing and background. Add a gap and pick a solid background, or keep the canvas transparent for PNG and WebP.
  3. 3. Export. Download PNG for a lossless result, or JPEG and WebP with an adjustable quality setting.

JPEG cannot store transparency, so choosing it fills the canvas with a solid background. Very large stitches are scaled down to stay inside the browser's maximum canvas size, and the tool says so before you export.

The interactive stitcher loads with JavaScript.