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OS Authority

Merge photos into one image

Put two or more photos together side by side, one above the other, or in a two-column grid, and save the result as a single JPG. It all happens on your device.

Your photos are merged on this device and never uploaded. We don't see, store or log your files.

How it works

  1. Tap Choose files, or Take photo on a phone, and add two or more photos.
  2. Put them in order with the arrows.
  3. Choose side by side, stacked or grid, and whether you want a gap.
  4. Tap Merge photos, then Download or Share the image.

Why merge photos here

Your photos are combined by your own browser and never uploaded, so before-and-after pictures, ID documents and family photos stay private. There's no watermark and no account. Sideways phone photos are turned upright automatically, and camera and location data (EXIF) isn't copied into the result.

How the photos are sized

Side by side, every photo is scaled to the height of the shortest one; stacked, to the width of the narrowest. In the grid, two photos share each row at the width of the narrowest photo, and a shorter photo is centred in its row. Photos are never enlarged, so nothing gets blurrier. Two 4000 × 3000 phone photos side by side would make 8000 × 3000 (24 megapixels); results over 16.7 megapixels, the largest image iPhone browsers can draw, are scaled down to fit, which is still far sharper than any screen.

Gap, background and file size

A small gap is 2% of the photo height (or width), for example 60 pixels between 3000-pixel-high photos. Gaps and the empty space in a grid are filled with white or black. The result is a JPG at high quality: two 3 MB phone photos usually make a 3–6 MB image. To send it where files must be smaller, run it through Compress Image to KB.

Frequently asked questions

Can I merge photos into a PDF instead?

Yes: use JPG to PDF, which puts each photo on its own page of one PDF. This tool makes one single picture.

How many photos can I merge?

As many as you can add at once (20 on phones, more on computers). With many photos, the grid layout keeps the image from becoming very long.

Does it work with iPhone photos?

Yes. When you choose from Photos or take a photo here, iOS hands over a JPG. HEIC files from a computer can be converted first with HEIC to JPG.

Are my photos uploaded?

No. Everything happens in your browser on your own device.

Last reviewed: October 4, 2026

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