What Chux does to your photographs, what resolution is worth uploading, and what actually shows on a listing card.
Upload the biggest photograph you have. Your browser shrinks it to 1920px on the long edge and re-encodes it as WebP aiming at about 600 kB before it leaves your phone, so a 12-megapixel camera file becomes something that loads on a train.
| What | Value |
|---|---|
| Recommended | 1600 × 1200 px or larger |
| Smallest that still looks sharp | 800 × 600 px |
| Long edge after processing | 1920 px |
| Target file size | ≈ 600 kB |
| Hard ceiling per file | 10 MB |
| Photographs per listing | 10 |
| Formats accepted | JPEG, PNG, WebP, HEIC/HEIF |
A card crops the cover to 4:3 and centres it. Anything close to the top or bottom edge may not survive the crop; the open listing shows the whole frame.
| Where | Image width |
|---|---|
| Front page, desktop | 325 px |
| Catalogue and search, desktop | 256 px |
| Phone grid | 173 px |
| Dense rows (thumbnail) | 80–104 px |
| Share preview | 1200 × 630 px, drawn by Chux |
On a 2× screen (most phones), those boxes are painted at twice the size. That is why 1600px on the long edge is enough for even the largest card, and why a 500px photograph looks soft.
Chux crops a profile picture to a square and stores it as a 512 × 512 WebP. JPEG, PNG, WebP and HEIC go in; the finished file has to fit in 2 MB. Without one you are given one of twenty house marks in the brand colours; it is derived from your account, so it never changes under you.