Will images be uploaded?

No. Image bytes stay inside your browser tab for merging and compression.

What is the output format for merged images?

Merged collages download as PNG. Single-image compression outputs JPEG using your selected quality.

Why is the canvas limited?

Browsers cap canvas dimensions. Very large compositions are scaled down automatically to stay within safe limits.

Image Merge & Compress

Stitch multiple images into one PNG collage, or compress a single JPEG with adjustable quality—all locally in your browser.

Add images

Layout

Gap (px)

Add images to build a collage.

Collages and compression

Merged images export as PNG with a white background between items. Compression re-encodes a single image to JPEG using your quality slider; no file ever leaves the browser.

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Merge and Compress Images Without Uploading

A practical workflow for collages and lighter JPEGs entirely on the client.