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Meta Reels vs TikTok In-Feed
Both are 9:16 vertical feeds. Meta clamps Reels primary text at 72 visible characters. TikTok clamps captions at ~100.
Meta Reels and TikTok In-Feed are the closest direct comparison in the social ad ecosystem — both 9:16 vertical, both fast-scroll, both designed to feel native to short-form video culture. The character math diverges in one important way: Meta clamps Reels primary text at 72 visible characters, while TikTok shows ~100. That 28-character gap is the difference between "tight punchy hook" and "tight punchy hook plus payoff."
Headline behavior also diverges. Meta Reels has a 10-character visible headline window — yes, ten — designed for ultra-short labels. TikTok's 40-character display name doesn't visually truncate but does affect caption block compression past 30 characters.
Safe zones are similar but not identical. Both have right-rail engagement columns. Meta Reels' column extends 30%–80% Y (50% tall). TikTok's extends 28%–82% Y (54% tall). Both have bottom username/caption blocks; TikTok's is taller. Both have a sponsored CTA strip at the bottom.
@brand · Sponsored
Side-by-side spec
| Field | Hard max | Visible before truncate | Warn at |
|---|---|---|---|
| Primary text | 2200 | 72 | 60 |
| Headline | 100 | 10 | 8 |
Source: https://www.facebook.com/business/ads-guide/instagram-reels · Last verified 2026-04-15.
| Field | Hard max | Visible before truncate | Warn at |
|---|---|---|---|
| Caption | 2200 | 100 | 80 |
| Display name | 40 | 40 | 30 |
Source: https://ads.tiktok.com/help/article/in-feed-ads-overview · Last verified 2026-04-15.
Cross-platform safe budget
If you're writing one piece of copy for both surfaces, your safe budget is 60 visible characters and 10 characters for headline (Meta Reels' tightest constraint). Anything past those numbers won't survive both surfaces.
FAQ
- Why is Meta Reels' headline so tight?
- Because the headline strip on Reels is shorter than Feed. The platform fits less text in the same horizontal space.
- Should I duplicate creative across both?
- If composition respects both safe zones, yes. Otherwise customize.
- Which platform has higher CPMs?
- Varies by category and audience. TikTok In-Feed often slightly cheaper for younger demos; Meta Reels often cheaper for older demos.
- Does either platform allow longer videos?
- Both support up to 90 seconds. Performance peaks at 15–30 seconds on both.