A lookup page. If you want the reasoning behind a number, the linked page has it.
File types you can import
| Type | Extensions | Notes |
|---|---|---|
| JPEG | .jpg, .jpeg | The usual photo format. |
| PNG | .png | Supports transparency. |
| WebP | .webp | Supports transparency, and smaller than PNG at the same quality. |
| BMP | .bmp | Accepted, though large for what it holds. |
| GIF | .gif | Animation is not preserved. |
| SVG | .svg | Vector. Recolorable in the app. Limited to 2 MB and 5,000 elements. |
.pdf | Every page is offered individually, all pre-selected. |
See adding images, PDFs and SVGs for how each behaves once it is on the canvas.
What you can export
| Format | Result | Plan |
|---|---|---|
| PDF (Standard) | One PDF, one page per tile | All plans |
| PDF (Vector) | One PDF, vector content where possible | Pro, Pro+ |
| Images | One image file per tile | All plans |
Export resolution is Standard (160 DPI) on all plans, with High (300) and Max (600) on the paid plans. See export resolution.
Paper size limits
Named sizes have fixed dimensions — see supported paper sizes for all 30 with exact figures.
A custom paper size is entered in inches, centimetres or millimetres, and each side is held between:
| Unit | Minimum | Maximum |
|---|---|---|
| in | 1 | 60 |
| cm | 1 | 150 |
| mm | 1 | 1500 |
These bound the sheet, not the poster.
Poster size limits
In size mode, the finished poster is entered in one of five units, each side held between 1 and:
| Unit | Maximum |
|---|---|
| cm | 500 |
| ft | 20 |
| in | 200 |
| m | 5 |
| mm | 5000 |
Sheet count limits
In grid mode, columns and rows are each held between 1 and 20 — at most 400 sheets.
Size mode derives the count from your dimensions rather than capping it, so it will build grids that grid mode will not. If you are hitting either bound, a larger paper size is usually a better answer than a larger grid.
Practical limits
Beyond the stated bounds, your device decides:
- Very large posters at Max resolution can exhaust memory on phones. See export failed or blocked.
- On Android and iOS, very large images are downscaled for display only; this does not affect the export.
- Each exported sheet is capped at 5,000 pixels on its longest edge. On large paper that caps the effective resolution below the DPI you selected — an A1 sheet cannot reach 600 DPI, or even 160.
- AI enhancement caps its output so it cannot run a device out of memory.