Export a 9:16 slideshow video once in the maker and post the same file to TikTok, Instagram Reels, and YouTube Shorts — they all use vertical video, so one export covers all three.
Making a separate slideshow for each platform is wasted work. They all want the same 9:16 vertical video, so one good export should cover TikTok, Reels, and Shorts.
TikTok, Instagram Reels, and YouTube Shorts are all built around 9:16 vertical video at 1080x1920. That's a gift for anyone posting across all three: you don't need three different exports, you need one good one.
The maker exports exactly that format, so a single slideshow video uploads cleanly to all three without cropping or bars. Build once, post three times.
The video is identical across platforms, but a few things around it differ. Reels and TikTok both favor trending audio added in-app, so the export-silent-then-add-sound workflow applies to both. Shorts is more forgiving on baked-in audio but rewards a strong first second even more heavily.
Caption placement is the other consideration: each platform overlays its own UI slightly differently, so keeping text in the safe middle band ensures it's readable on all three rather than tuned to one.
Instagram and TikTok both have native photo-carousel features, but they don't travel. A carousel built in Instagram can't be posted to TikTok, and vice versa — you'd rebuild it each time. A video file has no such limit: it's just a file, so it uploads anywhere.
That's the core argument for making slideshows as videos when you post to more than one platform. The native features are convenient for single-platform posting; a video is the portable format.
The efficient routine: build the slideshow video once in the maker, export at 1080x1920. Upload to TikTok and add a trending sound. Upload the same file to Reels and add a trending sound there. Upload to Shorts, where you can leave your baked-in audio or add one. Fifteen minutes, three platforms, one build.
Keep the exported file and you've also got a reusable template — swap the photos next time instead of starting over.
Yes — both use 9:16 vertical at 1080x1920, so one export works for both, plus YouTube Shorts.
No — the same 1080x1920 file fits all three.
For Reels and TikTok, export silent and add trending audio in-app. For Shorts, baked-in audio is fine.
Native carousels can't be moved between platforms. A video file uploads anywhere.