How to combine images into one collage with OnyxPDF
- Drop two or more images into the tool.
- Set the number of columns, the gap spacing and the background colour.
- Choose cover (fill the cell, crop overflow) or contain (whole photo visible).
- Click “Combine” and download the collage.
Why do it in your browser instead of uploading?
- Order matters and you control it: reorder images in the list before combining.
- Cover vs contain is the control most quick collage tools omit — and the one that decides whether heads get chopped.
- No account, no upload, no template upsell.
- Output is one full-resolution image, ready to share or print.
Good to know (honest limits)
- The grid is uniform — every cell the same size. Artsy irregular layouts are a design-tool job (Canva and friends).
- Very large source photos make a very large collage; Resize first if you only need a web-size result.
Frequently asked questions
Cover or contain — which should I pick?
Cover fills each cell completely (some edges cropped) for a clean grid look. Contain shows every photo fully, with background colour filling the gaps.
Can I change the order of photos?
Yes — reorder them in the file list before combining; the grid fills left-to-right, top-to-bottom.
What is the output?
A single image (PNG or JPG) containing the whole grid at the combined resolution of its cells plus spacing.
Are my photos uploaded?
No. The collage is composed on a canvas in your browser.