LinkedIn posts can be up to 3,000 characters long (as of June 2026), but the platform only shows the first 210 characters in the feed before collapsing the rest behind a see more link. That means the first two sentences of your post act as your entire hook — readers decide whether to expand based solely on that opening. This LinkedIn Character Counter shows your exact character count as you type, with a running word count and reading-time estimate, so you can engineer a strong above-the-fold opening while still using the full 3,000-character allowance for substantive content when it warrants the length. Paste your draft below and watch the stats panel update instantly, with no account or download required.
Your LinkedIn profile headline is limited to 220 characters (as of June 2026), but that generous allowance is deceptive: in practice only about 60 to 70 characters are visible in search results, on connection request notifications, and in the people-you-may-know cards that drive most LinkedIn discovery. The rest of your headline is visible only when someone opens your full profile. Write the most important role, specialty, or keyword in the first 60 characters and use the remaining room for supporting context. The About section has a much higher ceiling of 2,600 characters — space for a short professional narrative — but again only the first 300 characters appear on desktop (roughly 200 on mobile) before the see more fold. Both fields deserve the same front-loading discipline as the post itself.
Connection request notes present some of LinkedIn's tightest constraints. Free accounts are capped at 200 characters per note; Premium, Sales Navigator, and Recruiter plans allow up to 300 characters (as of June 2026). Research from LinkedIn practitioners consistently shows that notes in the 120 to 180 character range achieve the highest acceptance rates — the sweet spot between "too terse to feel genuine" and "too long to read before deciding." Comments on posts have their own independent limit of 1,250 characters — useful to know when writing a substantive reply that might run long. Use the presets below to measure your draft against common limits, or simply watch the character count in the stats panel on the right.