TikTok to Facebook is the cross-post most creators skip — and that’s exactly why it works. Facebook’s Reels feed is hungry for short vertical video, the audience skews older and more local than TikTok’s, and since Meta announced in June 2025 that all Facebook videos will be shared as Reels, one 9:16 master now covers the platform’s entire video surface.
The file transfers untouched; the packaging doesn’t. TikTok’s watermark trips Meta’s originality guidance, its licensed sounds stay behind on TikTok, and a caption built for TikTok search lands in a feed that folds text after roughly 125 characters on mobile and treats hashtag walls as spam. This guide maps the spec deltas, what breaks, and the workflow — manual, or composed once in SocialKit.
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Everything that changes between the two composers, side by side.
| Spec | TikTok (from) | Facebook (to) |
|---|---|---|
| Caption limit | 2,200 characters via the posting API used by scheduling tools (TikTok’s own app has rolled out captions up to ~4,000) | 63,206 characters (feed truncates after a few lines with “See more”) |
| Video length | Up to 10 minutes in-app; 60-minute pre-recorded uploads rolling out to many accounts | Long feed uploads supported (hours); Facebook Reels are far shorter — check the composer for your account’s cap |
| Hashtags | Hashtags and @mentions count toward the caption limit; a few specific tags is the platform convention | Supported but lightly used — one or two at most reads native on Facebook |
| Primary canvas | 1080 × 1920 px · 9:16 (video) | 1080 × 1920 px · 9:16 — Facebook Reels share the Stories canvas |
| Watermark on export | Downloads are stamped with the TikTok logo and your handle | Meta’s Reels guidance says watermarked videos are recommended less |
| Sound licensing | Music library licensed for use on TikTok only | Rebuild with Facebook’s audio library or your original track |
| Links in captions | Not clickable — “link in bio” culture | Clickable in posts — add the real URL |
The good news
The fine print
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Tip 1
Treat Facebook as a second audience, not an echo: the same video that rides a trend on TikTok often works on Facebook as a self-contained story for people who’ve never heard the sound — rewrite the caption for someone with zero TikTok context.
Tip 2
Use the clickable link: TikTok captions can’t carry tappable URLs, Facebook posts can. If the video sells, books, or announces anything, the Facebook variant is where the actual link belongs.
Tip 3
Lean on shares and groups: Facebook distribution still runs heavily through reshares. A caption that asks a question or invites tagging a friend travels further than a transplanted TikTok one-liner.
FAQ
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Meta’s published Reels guidance — which covers Facebook as well as Instagram — says visibly watermarked or low-resolution videos are recommended less. No exact penalty figure is published, so treat any percentage you read elsewhere as an estimate. A clean, watermark-free upload of the same video is treated like any other Reel.
Meta announced in June 2025 that all videos on Facebook will be shared as Reels, removing the old 90-second cutoff as the change rolls out to profiles and Pages. Rollouts land unevenly, so check your composer for the cap on your account. TikTok, for comparison, allows 10 minutes in-app with 60-minute uploads rolling out.
Rarely as-is. Facebook’s 63,206-character limit means nothing gets cut, but feeds fold posts behind “See more” at roughly 125 characters on mobile — so the hook must lead. Cut the hashtag block to one or two tags, drop TikTok-specific CTAs, and add a clickable link if you have one.
Trending sounds from TikTok’s library are licensed for TikTok and don’t transfer. Your original audio travels fine inside the video file; for music, rebuild with Facebook’s own audio tools — and note that licensed-music availability can differ between personal profiles and Pages.
Compose once, customize the caption per network, and let SocialKit publish to TikTok, Facebook, and 9 more platforms on schedule — no re-uploading, no copy-paste.
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