LinkedIn Character Counter — Free Post Length & Fold Checker

LinkedIn's 3000-character post limit

LinkedIn allows up to 3000 characters per post — significantly more room than Twitter but with its own hidden constraints that trip up even experienced creators. The hard limit is generous enough for a detailed case study, a numbered list, or a short opinion piece, but the real writing challenge isn't the ceiling: it's the two fold points that determine whether anyone reads past the first sentence.

PostTruncate's LinkedIn character counter tracks your total in real time, colour-coding the display so you always know how much runway remains before LinkedIn stops accepting input.

The desktop fold (~210 chars) and the mobile fold (~140 chars)

This is the detail that separates LinkedIn veterans from everyone else. LinkedIn doesn't have one fold — it has two, and they sit at very different character counts depending on the device your audience is using.

On desktop, LinkedIn shows roughly 210 characters of a post before replacing the rest with a "…see more" link. On mobile, that window shrinks to approximately 140 characters — barely a sentence and a half. The user taps "see more" only if what they've already read compels them to.

Why does the difference matter? Because the majority of LinkedIn's active users browse on mobile. A post that hooks brilliantly at character 180 will perform well for desktop readers and fail completely for the mobile audience — which is most of your reach. Writing for both folds means your opening line has to carry the full weight of the post's value proposition within the first 140 characters, while the next 70 characters (before the desktop fold) can add a second layer of context.

PostTruncate renders both fold markers live as you type, so you can see in real time exactly which words fall inside the mobile window, which are visible only on desktop, and what disappears behind "see more" on both devices. Adjust your opening until the hook works at 140 characters without relying on the desktop margin.

Front-loading: the only LinkedIn copywriting rule that consistently drives reach

The LinkedIn algorithm uses dwell time and early engagement (likes and comments in the first hour) as primary ranking signals. Both depend on whether the opening line stops the scroll. Front-loading means putting your most specific, most surprising, or most useful statement first — not as a preamble, not after context-setting, but as the literal first sentence.

Weak openings ("I want to share something I've been thinking about…") burn your 140-character mobile window on throat-clearing. Strong openings ("We cut our onboarding drop-off by 40% by removing one field from the sign-up form") use every character to earn the next tap.

Use PostTruncate to draft your post, watch the mobile fold marker, rewrite the opening until it delivers a complete, compelling reason to read more — then publish with confidence.