LinkedIn Ad Character Limit Checker

Sponsored Content, Text Ads and Message Ads — every field, every cap, with a free live checker and AI rewrite-to-fit.

150 characters
of Sponsored Content intro text visible before truncation · hard cap 3,000

Check your LinkedIn ad copy

Introductory text 150 visible / 3000 max0 / 150
Intro text fits without truncation.
Headline 70 visible / 200 max0 / 70
Headline fits without truncation.
Description 100 visible / 300 max0 / 100
Description fits without truncation.
Headline 25 max0 / 25
Headline fits within the limit.
Description 75 max0 / 75
Description fits within the limit.
Subject line 60 max0 / 60
Subject line fits within the limit.
Message body 1000 max0 / 1000
Message body fits within the limit.

The short answer

LinkedIn runs three main self-serve ad formats, and each has its own character rules. Sponsored Content (the single-image feed ad) accepts up to 3,000 characters of introductory text but truncates it around 150 characters in the feed; the headline accepts 200 but shows about 70; the optional description accepts 300 and shows about 100 — and only on some placements. Text Ads, the small sidebar units, are strict hard caps: 25 characters for the headline and 75 for the description. Message Ads (sponsored InMail) give you a 60-character subject line and a 1,000-character body.

LinkedIn ad character limits by format

FormatFieldVisibleHard cap
Sponsored ContentIntro text~150 characters3,000
Headline~70 characters200
Description~100 characters300
Text AdsHeadline25 characters25
Description75 characters75
Message AdsSubject line60 characters60
Body1,000 characters1,000

Limits are set by LinkedIn and occasionally change; figures reflect the current publicly documented caps.

Why the visible limit matters more than the cap

A 3,000-character intro text sounds generous until you remember that a B2B buyer scrolling the feed sees only the first 150 characters — roughly two short sentences — before the “…see more” fold. LinkedIn's own creative guidance is to keep intro text under 150 characters precisely because truncated CTAs measurably reduce click-through. The checker above shows green while you're fully visible and amber the moment you cross into truncation territory, and the ✨ Rewrite to fit button will compress an over-long draft without losing the pitch.

This page covers paid ad units. Writing an organic LinkedIn post (3,000-character limit) or optimizing your profile? See the LinkedIn character limit guide.

Frequently Asked Questions

What is the LinkedIn ad character limit for intro text?
Sponsored Content introductory text accepts up to 3,000 characters, but the feed truncates it at roughly 150 characters behind a '…see more' link. LinkedIn recommends staying under 150 for best performance.
How long can a LinkedIn Text Ad be?
Text Ads are strict: 25 characters for the headline and 75 characters for the description. There's no truncation buffer — the platform simply won't accept more.
What are the Message Ad (InMail) character limits?
The subject line caps at 60 characters and the message body at 1,000 characters. Short, personal-sounding subjects consistently outperform ones that read like ad headlines.
Is this the same as the LinkedIn post character limit?
No. Organic LinkedIn posts allow 3,000 characters with truncation around 210 in the feed — different numbers from the ad formats. This page covers paid ads; see our LinkedIn character limit guide for organic posts.

Checking copy for more than one platform? The full Ad Copy Checker covers Google Ads, Meta, LinkedIn, TikTok, X and email subject lines in one place — with AI rewrite-to-fit on every field.

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Related guides

Compare with the other ad platforms: Google Ads character limits, Facebook ad character limits and TikTok ad character limits. For organic content, see the LinkedIn post limit, Twitter (X) limit and Instagram limit guides, or check any text in the free character counter.