Taking a Facebook video to TikTok sounds straightforward, but the first question you have to answer is about format, not scheduling: is the clip actually a vertical video? A long horizontal Facebook feed upload is not a native TikTok — it needs a 9:16 reframe before it belongs on the platform at all. Only a Facebook Reel or vertical short story (1080 × 1920 px) arrives on TikTok's canvas without an aspect-ratio rebuild.
Once the format question is settled, the real friction shifts to caption culture. Facebook supports up to 63,206 characters in a post, but scheduling tools publish to TikTok against its 2,200-character API cap. More importantly, Facebook is near-tagless — one or two hashtags at most reads as native — while TikTok discovery runs on a handful of specific tags that you need to add from scratch. This guide walks the exact spec deltas, what breaks in transit, and how to do the move by hand or in SocialKit.
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Everything that changes between the two composers, side by side.
| Spec | Facebook (from) | TikTok (to) |
|---|---|---|
| Primary canvas | 1080 × 1920 px · 9:16 (story) | 1080 × 1920 px · 9:16 (video) |
| Caption limit | 63,206 characters (feed truncates after a few lines with “See more”) | 2,200 characters via the posting API used by scheduling tools (TikTok’s own app has rolled out captions up to ~4,000) |
| Video length | Long feed uploads supported (hours); Facebook Reels are far shorter — check the composer for your account’s cap | Up to 10 minutes in-app; 60-minute pre-recorded uploads rolling out to many accounts |
| Hashtags | Supported but lightly used — one or two at most reads native on Facebook | Hashtags and @mentions count toward the caption limit; a few specific tags is the platform convention |
| Source format gate | Feed video can be any orientation; only 9:16 vertical clips (Reels/Stories) are native TikTok candidates | Full-screen 9:16 vertical canvas (1080 × 1920 px) — horizontal video must be reframed before upload |
| Watermark on export | Re-downloading from Facebook may bake in player UI artifacts — always use the original master | Use a clean master export; avoid re-uploading a file pulled from the source platform |
| Sound licensing | Platform-licensed music cleared for Facebook only | Rebuild with original audio or TikTok's Commercial Sound Library to avoid a mute or rights flag |
The good news
The fine print
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Tip 1
Always gate on orientation first: before scheduling, right-click the source file and confirm it's 9:16. Horizontal clips that slip through will appear pillarboxed on TikTok and look like reposts from another app.
Tip 2
Build your TikTok tags from the destination, not the source: open TikTok's search bar, type your topic, and pick 3–5 tags that are active on the platform — Facebook's near-tagless approach gives you nothing to port over.
Tip 3
Rewrite the CTA in TikTok's voice: Facebook copy often includes "See more" links or page mentions that mean nothing to a TikTok viewer; replace them with a comment prompt or a follow hook that fits TikTok's conversational culture.
FAQ
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Only vertical clips (9:16) move cleanly. A horizontal Facebook feed video needs to be reframed to 9:16 in an editing tool before it belongs on TikTok's canvas. Once the format is correct, the main remaining checks are caption length (under 2,200 characters via scheduling tools), audio licensing, and adding TikTok-specific discovery tags.
Scheduling tools publish to TikTok against its 2,200-character API cap. TikTok's own app has been rolling out captions of up to approximately 4,000 characters for some accounts, but when scheduling with a third-party tool like SocialKit the safe limit to write toward is 2,200. Hashtags and @mentions count toward that total.
Yes — and you need to write them fresh. Facebook is near-tagless (one or two at most is the native convention), so a Facebook post typically carries no useful tags to port. TikTok discovery is driven by a few specific topic tags, so add 3–5 tags that are active on the platform for your content category. Because they count toward the 2,200-character limit, keep them targeted rather than broad.
Not automatically. Music licensed through Facebook's rights system is cleared for use on Facebook, not on TikTok. Posting that audio to TikTok could result in the track being muted or the post flagged, depending on how rights are managed on TikTok's side. To avoid the risk, use original audio or a track sourced from TikTok's Commercial Sound Library for the destination post.
Compose once, customize the caption per network, and let SocialKit publish to Facebook, TikTok, and 9 more platforms on schedule — no re-uploading, no copy-paste.
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