gizmobench

Collage Maker

Drop in up to twelve pictures, pick one of four layouts, and download the collage as a PNG or a JPEG. The pictures are decoded in this browser tab and drawn onto a canvas here, so nothing is uploaded, there is no account, and the only limit on file size is the memory of the device you are on. The layout on screen is the layout in the file, at the pixel size printed under it, and a photograph carrying an orientation tag is turned upright rather than saved on its side.

Export2400 × 1800 · PNG

No pictures yet. Drop some in, or use Add pictures.

· or drop them anywhere on the stage

Never uploadedNo size limitNo accountUp to 12 pictures
Layout
Gap
Background
Format
Download size
2400 × 1800

Keeps a clear background and every pixel as drawn. The download size follows the largest picture you dropped in, so a collage of phone photographs saves far bigger than it looks on this screen.

  • Five holiday photosfeature layout, 16 px gap
    one big, two down the side, two beneath
  • A portrait from a phonecarries an orientation tag
    saved upright, not sideways
  • A 40 MB camera filedecoded in this tab
    no upload, no size limit but memory
Your pictures stay on this device. The file you download is the canvas at the pixel size printed under it, at full resolution rather than the size shown on screen, and photographs are rotated to match their own orientation tag so a phone picture is not saved sideways. Your pictures are decoded in this tab and never uploaded, and nothing it was not given can improve a small source. There is no upload, no account and no watermark, and no image byte is handed to analytics either: the only thing the page records is that the tool was used.

Common questions

How many pictures can go in one collage?
Twelve. Past that the cells get too small to be worth cropping a photograph into, and the browser is holding twelve decoded images in memory at once already. If you drop in more than twelve, the tool says how many it left out rather than silently taking the first few. The four layouts arrange whatever number you give them. Feature gives the first picture a block two cells wide and two tall and puts the rest around it. Grid uses equal rows and fills each one edge to edge, so a count that does not divide evenly widens the last row instead of leaving a hole. Row and Stack line the pictures up in one strip, across or down. Whichever you pick, the cells tile the collage exactly, so there is no stray band of background down one side.
What resolution does the collage save at?
Bigger than it looks on screen. The export follows the largest picture you dropped in: a collage built from 4032 pixel phone photographs saves at 4032 pixels on its longest side rather than at the few hundred pixels the preview occupies. The exact number is printed in the Download size box under the collage and in the Export line beside it, and that is the canvas the file is encoded from, so the label and the download cannot disagree. Very large collages are brought back in proportion to what a browser canvas will hold, which is why the printed number is the one to read rather than a number you calculated yourself.
Are my pictures uploaded anywhere?
No. There is no server in this. Each file is read in the page, decoded with the browser's own image decoder, drawn onto a canvas, and encoded back out as the file you download. No image byte is sent to an endpoint, to analytics or to error reporting, and nothing about a picture is written to your browser's storage either: the tool remembers your layout, gap, background and format between visits, and that is all it remembers.
Why does a phone photo come out sideways in other collage tools?
Because a phone usually stores the picture the way the sensor read it and adds an EXIF orientation tag saying which way up it should be shown. A tool that ignores the tag saves the raw frame, so a portrait comes out on its side. This one reads the tag out of the file's own bytes, then checks whether the browser already applied it when it decoded the file, which current browsers do and which it can tell because a quarter turn swaps a picture's width and height, and turns the picture itself only when the decoder did not. That is the difference between one rotation and either none or two.
Can I have a transparent background between the pictures?
Yes, with the Clear background and the PNG format. JPEG has no transparency at all, so a clear background is saved as white there and the tool says so under the readout rather than letting you find out in the file. The gap control sets how much background shows: none for edge to edge, or 8, 16 or 32 pixels of the collage's own scale between the cells.
How do I change the order of the pictures?
Drag one picture onto another on the stage and it takes that place, with the rest shifting along, or move the keyboard focus onto a picture and use the arrow keys to move it earlier or later and Backspace to remove it. The first picture is the one that gets the big cell in the Feature layout, so reordering is how you choose which photograph leads.
Are the pictures stretched to fit their cells?
No, they are cropped. Each picture is scaled until it covers its cell and the middle of it is kept, so a portrait in a wide cell loses its top and bottom rather than being squashed. Nothing is ever distorted to fit, which is why a tall photograph in a Row layout shows a band from its middle.

The file you download is the canvas at the pixel size printed under it, at full resolution rather than the size shown on screen, and photographs are rotated to match their own orientation tag so a phone picture is not saved sideways. Your pictures are decoded in this tab and never uploaded, and nothing it was not given can improve a small source.