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PulsarKit

Make an Instagram photo collage

Put two to twenty photos on one canvas, as a grid, a mosaic, a filmstrip or placed by hand, and download the result as a single picture.

Drop your files here

.jpg, .jpeg, .png, .webp, .avif · up to 50 MB

How to Build the collage

  1. 1

    Add your photos

    JPG, PNG, WebP or AVIF, two to twenty of them, up to 50 MB each and 300 MB in total. Drag the cards to set the order.

  2. 2

    Pick a layout and set the gaps

    Grid, mosaic, filmstrip or free placement. Gap, padding, background colour, corner radius and shadow all update the preview as you move them.

  3. 3

    Download the collage

    One file comes back: collage.jpg, or collage.png if you asked for a transparent background.

Square, 1080 pixels, ready to post

This page starts on the canvas Instagram uses for a square post: 1080 by 1080. That means the collage you build is the collage that gets posted, without the app resampling it on upload and softening every edge in the process. If you would rather post portrait, switching the canvas to 1080 × 1920 takes one click and the arrangement carries over, because the layout is described in proportions, not pixels.

How many photos to use

Four is the sweet spot for a square post: a 2 × 2 grid gives each picture a quarter of the frame, which is still big enough to read on a phone. Nine works for a mosaic of related shots, a trip, a process or a before-and-after series, but past that the individual pictures become thumbnails. If you have twenty photographs worth showing, a carousel of several collages beats one crowded square.

Gaps, background and what reads well on a feed

A small gap, eight to sixteen pixels at this canvas size, separates the pictures without looking like a scrapbook. White is the default background and disappears against the light theme of the app; a mid grey holds its own better against both themes. Rounded corners of ten to twenty pixels soften the grid; anything more starts to look like a widget. The one setting worth changing deliberately is fit: cover fills every cell and crops the edges, contain shows every photograph whole and leaves margins.

Carousel or collage: when to use which

A carousel and a collage solve different problems. A carousel gives each photograph the whole screen and lets people swipe at their own pace, so it suits a set where every picture deserves a look: a product from several angles, a trip in order, a recipe step by step. A collage shows the whole set in one glance and holds together as a single image, which is what you want for a cover, a comparison, a before-and-after or a montage that will be reposted elsewhere. The two combine well: build one collage as the opening slide, then put the individual photographs behind it as the following slides. Whichever you choose, make the collage at 1080 pixels wide first, because the first slide fixes the ratio for the rest of the carousel.

The photos never leave your browser

Decoding, layout, drawing and encoding all happen inside this tab, on your own device. Nothing is uploaded, there is no account and no queue, and closing the tab clears every picture you added. That also means the work costs us nothing, so there is no limit on how many collages you make.

Frequently asked questions

How many photos can I put in one collage?

Twenty, and at least two. Above twenty the cells get too small to see and the browser starts struggling with the memory, so extra files are left out and the page tells you how many. The total across all the pictures is capped at 300 MB; if you are over it, compress them first; the link is on the error.

Will my photos be stretched or squashed?

No. Every picture is scaled by the same factor horizontally and vertically, in both cover and contain mode. Cover fills the cell and trims the overhang; contain fits the whole picture and leaves background-coloured margins. Neither one distorts a face or a building.

What is the difference between cover and contain?

Cover is about the collage looking solid: every cell is filled edge to edge, and whatever does not fit is cropped away, centred. Contain is about the photos staying whole: everything you shot is still there, and the space left over in each cell is painted with the background colour. Cover is the default because most collages are looked at, not studied.

How do I change the order of the pictures?

Drag the cards in the list, or use the up and down buttons on each card if you would rather not drag. Grid and filmstrip layouts follow that order exactly. Mosaic is the exception: it sorts by shape so the rows come out even, so the card order does not control it.

Can I print the collage on A4?

Yes. Choose the 2480 × 3508 canvas, which is A4 at 300 dpi, the resolution a photo printer actually uses. Use photos of a decent size for that: twenty small phone screenshots blown up to a third of a sheet each will look soft no matter what the tool does.

Are my photos uploaded to a server?

No. Everything runs in your browser, in this tab. There is no upload, no account and no daily limit, and the pictures are gone from memory as soon as you close the page.

How do I add a caption to the collage?

Build the collage, then send the result straight to Add Text. It is one of the next steps offered under the download button, and the file carries over without another upload. Add a border around the whole thing the same way.

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