TLDR
A TikTok carousel is a photo-mode post: up to 35 images, each at 1080×1920 px (9:16), JPG or PNG. Post one in the app via + → toggle to Photo → select multiple images → Next → post. TikTok auto-adds music (you can swap or mute it, not remove it). Design vertical — reused 4:5 Instagram slides get letterboxed.
What a TikTok carousel actually is
TikTok calls it photo mode: a post made of still images that viewers swipe through horizontally, with a music track underneath. Unlike a slideshow video, the slides don't auto-advance — the viewer controls the pace, which is exactly what makes the format work. Every swipe is a deliberate act of engagement, and every second spent reading a slide is dwell time.
That mechanic should sound familiar: it's the same one that makes Instagram carousel posts the highest-reach format on that platform. Cross-platform carousel data tells a consistent story:
The impressions number comes from carousel performance studies across social feeds generally, not TikTok specifically — TikTok doesn't publish per-format reach data. But the mechanism it measures — swiping keeps people on the post, and time-on-post is what feed algorithms reward — applies wherever swiping exists. On a platform built entirely around watch time, a format viewers page through at their own pace is not a niche feature.
The practical upside for creators: photo carousels are the lowest-production format on TikTok. No filming, no cutting, no talking to a camera. If you can write and lay out ten slides, you can publish daily.
TikTok carousel dimensions and specs
Two things deserve emphasis. First, 9:16 is a strong recommendation, not a hard requirement — TikTok will accept squarer images, but anything short of full-height gets displayed with dead space around it, and dead space on a full-screen platform reads as low effort. Second, consistency beats cleverness: one portrait slide in a set of verticals forces TikTok to reconcile the mismatch, and the reconciliation is never flattering.
Export quality matters more than on most platforms because TikTok compresses aggressively. Start from lossless PNG at exactly 1080×1920; a pre-compressed JPG that gets compressed again is where muddy text comes from — the same double-compression trap covered in our Instagram carousel size guide.
How to post a carousel on TikTok
The flow is mobile-first — you build the post in the TikTok app:
1. Tap + and switch to Photo
Open TikTok, tap the + button, and toggle the capture mode to Photo instead of Video. This is the step people miss; the carousel option doesn't announce itself.
2. Select your images in order
Tap the upload/gallery icon, make sure multiple selection is on, and tap your slides in the order you want them to appear — the selection sequence is the slide sequence. Up to 35, but a tight six to ten is usually the better post.
3. Handle the sound
TikTok drops a music track on the post automatically. You can replace it with any sound, or mute it — the post then plays silent, though the track stays attached to it. Most viewers browse with sound on, so if you keep it, choosing a track that fits (or trends) takes thirty seconds and is one of the few TikTok-specific levers you have.
4. Add overlay elements if needed
Photo mode supports text, stickers and filters on top of your images — useful for a quick annotation, unnecessary if your slides already carry designed text. Bake important text into the slides themselves so it survives re-use on other platforms.
5. Caption, cover, post
Write the caption, add hashtags, and post. Slide one is your cover in the feed — it does the job a video hook does, so lead with the strongest claim, number, or question you have, not a title card.
Designing for TikTok vs Instagram
If you already make Instagram carousels, the content skills transfer directly — hook slide, one idea per slide, payoff at the end. Three things change:
- The canvas is taller. 9:16 gives you roughly 40% more vertical space than Instagram's 4:5. Use it for breathing room and bigger type, not more words — TikTok viewers decide whether to swipe even faster than Instagram viewers do.
- Keep content out of the edge zones. TikTok's UI overlays — caption, username, and the action rail on the right — sit on top of your image. Keep headlines and key visuals in the middle ~70% of the frame, and treat the bottom quarter as caption territory.
- Sound exists. Instagram carousels are silent by default; TikTok carousels always have a track. You don't need to design around it, but a deliberate music choice is free engagement that most carousel posters skip.
The wrong move is exporting one 4:5 set and posting it everywhere: on TikTok it floats in letterbox bars, and the caption overlay lands on your bottom text. Design at each platform's native ratio — or use a tool that adapts one design between ratios instead of making you rebuild it.
Design once, export everywhere
TikTok carousel slides are just images — which means any carousel workflow that exports clean PNGs already works for TikTok.
That's the honest version of the pitch: xcarousel generates a designed carousel from a topic, URL, or PDF and exports pixel-exact PNG slides, with Instagram and LinkedIn presets built in. There's no TikTok preset yet — 9:16 isn't a one-click export the way 1080×1350 is, so weigh that if TikTok is your primary platform. But the part that actually costs you time — writing the slides, laying them out consistently, exporting sharp images — is the part the tool does in about a minute, and the slides it exports post to TikTok like any other images. Upload them in the TikTok app, pick a sound, and post.