The TikTok Photo Post size (1080×1350px)
TikTok's photo mode lets you post still images and swipeable carousels, and 1080x1350 at a 4:5 portrait ratio is a strong choice for filling the vertical feed without wasting space. TikTok is a full-screen, phone-first experience, so a tall image occupies far more of the display than a square or landscape shot, giving your content more presence as viewers scroll and pause.
The 4:5 ratio is a deliberate compromise on TikTok. A true full-screen 9:16 image is even taller, but it pushes content dangerously close to the UI, where the caption, username, and the action buttons stacked on the right can overlap your image. At 1080x1350 you get a tall, immersive frame while keeping a safer margin from those overlays, which is especially useful for carousels where text or product details need to stay readable across every slide.
For photo posts that perform, design each slide to be legible at a glance and keep key subjects and any text centered, away from the bottom and right edges where TikTok's interface lives. Carousels reward a clear first frame that earns the swipe and a consistent look across the set. Everything here resizes 100% in your browser with no upload and for free, so your photos stay private on your device. TikTok frequently updates its layout, safe zones, and supported sizes, so verify the current spec before publishing an important post.