12 Photo Collage Online — 4×3 Grid
Twelve pictures in one image: four across, three rows. Free, no signup, everything runs locally in your browser.
Drop photos here or click to choose
Drag and drop your file here or click to select
How to make a 4×3 collage of 12 photos
1. Upload all 12 photos
Drop twelve pictures into the upload area or pick them manually. The twelve photos automatically fall into a 4×3 grid in the order you uploaded them.
2. Pick an orientation
“12 photos · 4×3” — horizontal grid, four across. “12 photos · 3×4” — vertical, three across. Pick the aspect ratio, background colour, and gap that match your target platform.
3. Download PNG
Click “Download PNG” — the large collage saves in high resolution. Great for end-of-year recaps, wedding roundups, trip reports, and photobooks.
Why use Convertilo for a 12 photo collage
12 photos, no cloud upload
All twelve pictures stay in browser memory. Convertilo doesn’t send anything to a server — safe even for large private photo archives.
No subscriptions or watermarks
Build as many large collages as you need for free. No limits on how many photos and no captions on the final PNG.
Handles large batches
12 photos is a sizeable batch and Convertilo handles it without lag even on a phone. Upload pictures in batches or all at once.
Two 4×3 and 3×4 layouts
Horizontal 4×3 grid (four across, three rows) for feed posts. Vertical 3×4 grid (three across, four rows) for Stories and mobile formats.
FAQ about 12 photo collages
How do I make a 4×3 collage of 12 photos online?
Open this page — the “12 photos · 4×3” template is preselected. Drag twelve pictures into the upload area, and they’ll automatically fall into the grid. Tune the gap and click Download PNG.
What is the difference between 4×3 and 3×4 grids?
4×3 is four photos across in three rows — a horizontal layout for wide formats and the feed. 3×4 is three across in four rows — a vertical layout for Stories and mobile posts. Switch between them in the template gallery on the right.
What resolution will the 12-photo collage have?
Convertilo exports the collage in high resolution — up to 2160 px on the long edge. Each cell of a 4×3 grid ends up around 540 px, which is enough for both social media and a printed photobook.
What aspect ratio should I pick for 12 photos?
For a 4×3 grid, 4:3 (classic frame ratio) or 1:1 (Instagram) both work well. For a 3×4 grid, pick 4:5 (vertical post) or 9:16 (Stories). For A4 printing, pick the A4 aspect ratio.