Primary Text Character Limits by Network (2026)

Primary text is the body copy above or beside your creative on social feeds. Each network truncates at a different visible character count, and the hard limit is almost never what matters — the truncation point is. This page documents both.

Visible limits vs. hard limits. Every network publishes a hard character limit (the point at which the ad manager rejects your copy) and an unpublished *visible* limit (the point where the platform inserts a 'See more' link or clips the line). The hard limit is a technical ceiling. The visible limit is what actually controls whether your hook gets read. They are rarely the same number.

Network-by-network reference:

• Meta (Facebook + Instagram) Feed primary text: 125 characters visible on mobile before 'See more'; hard limit 3,000. Stories, Reels, and Carousel inherit the same 125-character mobile truncation.
• TikTok In-Feed Ad caption: 100 hard limit on paid In-Feed creative; roughly 50 characters visible before the caption clips behind the right-rail UI.
• TikTok Spark Ads: inherits the organic post limit of 2,200 characters, but feed truncation still hits at ~50 visible.
• LinkedIn Sponsored Content intro text: 600 hard limit; ~150 visible on desktop before 'See more', and closer to ~100 on mobile depending on viewport.
• LinkedIn Message Ads body: 1,500 characters, no truncation (rendered in full inside the inbox UI).
• X (Twitter) Promoted Posts: 280 characters total for standard accounts. X Premium accounts can post up to 25,000, but Promoted Post placement still favors the 280-character render.
• Reddit Promoted Post body (text): 40,000 characters for text posts; link posts use only title (300).
• Pinterest Promoted Pin description: 500 hard limit, ~50–75 visible depending on placement.

Why these numbers exist. The 125-character Meta limit isn't arbitrary — it's the line count that fits above the 'See more' fold on a 375px-wide iPhone viewport (the most common mobile screen Meta optimizes for). TikTok's ~50-char visible window exists because the right-rail UI (profile, like, comment, share, sound) eats roughly 60px of horizontal space, leaving very little caption real estate. LinkedIn's 150-char desktop visible reflects the original 2017 feed redesign and hasn't moved since.

What happens when you exceed the limit:

• Hard limit exceeded: ad rejected at upload, error returned in the editor. No silent fail.
• Visible limit exceeded: copy truncates mid-sentence with an ellipsis or 'See more' link. The ad still serves; the hook just gets cut.
• Special characters: emoji count as 2-4 bytes each but typically register as 1-2 characters in Meta's counter. Test before assuming.
• RTL languages (Arabic, Hebrew): same character limits apply, but the truncation point can render differently because of bidirectional text wrapping. Always preview in the actual feed.
• Line breaks: each \n counts as one character on Meta and LinkedIn. Three line breaks in a row = three characters of your budget gone for whitespace.

Rules for fitting copy inside the visible window:

• Front-load the offer or hook in the first 40–50 characters. That's the floor across every network.
• Treat anything past the truncation point as *qualifier copy* — proof, specs, disclaimers — not the sales pitch.
• Don't end the visible portion mid-clause. If 'See more' has to appear, make it appear after a natural pause, not 'free shipping on orders over...'.
• Avoid front-loading brand name. 'Nike — running shoes built for...' wastes 7 characters on a logo that's already visible in the ad.
• Numerals beat words. '50% off' is 7 characters; 'fifty percent off' is 17.

Example

Original headline (60 chars): Discover our new running shoes designed for marathon training

Trimmed for a 30-char field: Marathon-ready running shoes (28 chars) — keyword front-loaded, brand context dropped, intent preserved.

For a 125-char Meta primary: Marathon-ready running shoes — tested at 26.2 miles. Free returns, ships in 24 hours, sizes 6–14 in stock now. (113 chars, fits with margin.)

Questions