TikTok slideshows should be 1080x1920 (9:16 vertical). The maker exports exactly that, scaling each photo to fit without stretching faces or leaving black bars.
Upload a slideshow at the wrong dimensions and TikTok either crops it badly or pads it with black bars — both of which look off and hurt performance.
TikTok is built for 9:16 vertical video, and the native resolution is 1080x1920 pixels. That's the size every slideshow should target. Post something square or landscape and TikTok will fit it into the vertical frame the only way it can — by cropping or letterboxing — and neither looks intentional.
Exporting at the right size from the start means your slideshow fills the screen the way viewers expect, with nothing cut off and no bars.
TikTok re-compresses every upload. If you hand it a low-resolution file, that compression starts from an already-soft source and the result looks noticeably worse — muddy text, fuzzy edges. Starting at full 1080x1920 gives the compression a clean source to work from, so the posted version stays sharp.
This is why exporting at 720x1280 is fine for quick posts but 1080x1920 is worth it for anything where quality reads — product shots, text-heavy slides, anything you're putting spend behind.
Most photos you'll use aren't already 9:16 — phone photos are often 4:3, camera shots 3:2, screenshots all sorts of ratios. The question is how the maker fits them into a vertical frame.
Stretching to fill distorts faces and looks bad. The maker instead scales each photo to fit and centers it with padding, so proportions stay correct. For photos you want edge-to-edge, crop them to vertical before importing.
Even at the right dimensions, the live post has TikTok's interface layered on top — the caption, username, and sound ticker along the bottom, icons down the right side. Anything important near those edges gets covered.
Keep captions and key subjects in the middle band of the frame. This matters most for text: a caption that looks fine in your export can be half-hidden behind the description once it's live.
1080x1920 pixels — 9:16 vertical, TikTok's native resolution.
TikTok crops or letterboxes it, which looks unintentional and can hurt performance.
Yes — starting from 1080x1920 gives the compression a clean source, so the posted version stays sharp.
It scales each to fit and centers it with padding, so faces and proportions aren't distorted.