LinkedIn Character Limits in 2026 (Complete Reference for Every Field)

A complete cheat sheet for every LinkedIn field — posts, articles, comments, headline, About, summary, ads — with the practical sweet spots that actually perform.

Every couple of months somebody on Twitter posts a screenshot of a LinkedIn error that says "you have exceeded the character limit" and the replies fill up with people guessing what the actual number is. The honest answer is that there is no single number — there are about thirty of them, one for each field, and several of them quietly changed in 2024 and 2025 when LinkedIn rebuilt its post composer and ad formats. Some of those changes shrank limits. A few expanded them. Most professionals are still working from the limits they memorized three years ago, which is why their posts get truncated and their headlines get cut off in the search preview.

This is the version of the cheat sheet I keep open in a tab when I am writing for LinkedIn. It covers every field a normal user touches — feed posts, articles, comments, the profile fields, connection notes, DMs, InMail, and every ad format — with the hard cap LinkedIn enforces and the practical sweet spot where engagement actually peaks. The two numbers are rarely the same, which is the point of the guide.

Feed posts — 3,000 characters

A regular text post in the LinkedIn feed has a hard cap of 3,000 characters, including spaces, line breaks, hashtags, and emojis. Anything beyond that gets blocked at the composer level — you cannot publish it. The cap has been stable since 2020 and there is no sign of it changing.

The practical limit is much lower. LinkedIn truncates every post at roughly 210 characters in the feed, replacing the rest with a "see more" link that the reader has to click to expand. Click rates on that "see more" hover around 25-35 percent for engaging hooks and drop into single digits for boring ones. That means the first 210 characters of your post are doing 90 percent of the work, and the rest of the 3,000 only matters for the people who already decided to read.

The sweet spot for total post length, in our analysis of high-performing B2B content, sits between 1,200 and 1,800 characters. Posts shorter than 800 characters tend to lack substance and skim past the algorithm's dwell-time signal. Posts longer than 2,200 lose readers in the middle, and the comments shift from substantive replies to "great post" reactions because nobody finished it. The 1,200-1,800 band is long enough to make a real argument, short enough to be read on a phone in 90 seconds, and lands cleanly in the algorithm's preferred dwell-time window.

LinkedIn articles — 110,000 characters

Long-form articles published through the LinkedIn publishing tool (formerly "LinkedIn Pulse") have a generous limit of approximately 110,000 characters in the body — roughly 18,000-20,000 words depending on average word length. The article title is capped at 150 characters, the subtitle at 100, and the cover image caption at 150.

Almost nobody hits the body cap. The practical sweet spot for a LinkedIn article is between 800 and 2,000 words, which is 5,000-13,000 characters. Articles in that range pull the longest dwell times, get pinned to your profile's Articles tab, and feed the algorithm the "this person produces serious content" signal that boosts your future posts. Anything past 3,000 words on LinkedIn specifically (as opposed to a personal blog) starts to lose the audience, because LinkedIn readers expect a quicker read than they would on Substack or Medium.

The article title is the field most people get wrong. The 150-character cap feels generous, but LinkedIn search and the article preview card both truncate around 70-80 characters. Aim for 50-65 characters in the title for clean previews everywhere.

Comments — 1,250 characters

Comments on feed posts and articles are capped at 1,250 characters. The cap applies to top-level comments and to replies, with no separate limit for nested replies. There is no expansion mechanic — if you write 1,251 characters, the composer blocks the submit button until you trim.

The sweet spot for a high-engagement comment is 200-600 characters. Comments shorter than 100 characters read as filler and rarely get replies. Comments longer than 800 characters get visually truncated in the feed view (with a "see more" toggle) and lose engagement to the friction of expanding. Pinned comments under your own posts can run to 800-1,200 characters because readers who already opened your post are willing to read more — but in someone else's feed, keep it tight.

Headline — 220 characters

The headline is the line of text that appears under your name everywhere on LinkedIn — your profile, your search results, your post bylines, your comment signatures. It used to be capped at 120 characters. LinkedIn quietly expanded it to 220 characters in late 2020, and it has stayed there since.

The sweet spot for a headline is 120-180 characters. The first 80-100 are visible in most contexts before truncation, so the most important words go up front. Use the 120-180 band when you want to add credentials, niche signals, or a concrete promise after the role. Going past 200 characters tends to feel keyword-stuffed and degrades trust.

About section / summary — 2,600 characters

The About section (formerly "Summary") is the long block of text that appears under your headline on your profile. The cap is 2,600 characters, including spaces and line breaks. Emojis count as 1-2 characters depending on the encoding.

The "see more" fold sits at roughly 370 characters on desktop and 230 on mobile. Whatever you write before that fold is doing 80 percent of the recruiting, lead generation, or personal branding work. The rest only matters for visitors who already decided you are interesting enough to expand.

The sweet spot for an About section is 1,200-2,000 characters total, with the first 230 written specifically as a hook for mobile visitors. Treat About like a feed post with a longer body — first sentence is the headline of the section, next two are context, then a structured body with line breaks and short paragraphs, then a soft call-to-action with your contact preference or a link to your work.

Experience description — 2,000 characters per role

Each role in your Experience section gets its own description field with a 2,000-character cap. The role title is capped at 100 characters, the company name at 100, the location at 100, and the description at 2,000. There is no enforced minimum — you can leave a role with no description.

The sweet spot per role is 400-900 characters of description, with bullet points or short paragraphs rather than dense prose. Recruiters spend an average of 7-12 seconds per role on a LinkedIn profile, which means 400 characters of focused, scannable content beats 1,500 characters of full prose. Use the 2,000-character ceiling only for marquee roles you want to highlight, and leave older roles with shorter or no description.

Recommendations — 3,000 characters

A recommendation written for someone else (or that they wrote for you) has a 3,000-character cap. The sweet spot is 600-1,200 characters — long enough to be specific and credible, short enough to actually get read on the recipient's profile. Recommendations under 200 characters look perfunctory; recommendations over 1,500 characters rarely get fully read.

Connection request notes — 300 characters

The optional note attached to a connection request is capped at 300 characters for free LinkedIn accounts. Premium and Sales Navigator accounts have the same 300-character limit on the note field — Premium does not buy you more characters, only more InMail credits.

The sweet spot for a connection note is 150-280 characters. Notes under 80 characters read as automated spam ("loved your content!"). Notes that hit the cap exactly read as if you were trying to fit a pitch into the field, which is precisely what you should not be doing. The intent of a connection note is to give the recipient a reason to accept — context on how you found them, why you want to connect, and one specific reference to something they have published or worked on.

Direct messages (DMs) — 8,000 characters

Once two people are connected, the direct message field has an 8,000-character cap per message. There is no per-day or per-conversation cap for free accounts, but LinkedIn rate-limits accounts that send identical messages to many recipients in a short window — the spam tripwire activates around 50-100 outbound messages per day depending on account history.

The sweet spot for a DM is 200-600 characters. DMs that exceed 1,000 characters look like a sales pitch and trigger immediate skim-and-archive behavior. The most-read DMs in our analysis are short (3-5 sentences), reference something specific to the recipient, and end with one clear question or call to action.

InMail — 200 characters subject + 2,000 characters body

InMail is the paid messaging product that lets Premium and Sales Navigator users contact people they are not connected to. The subject line is capped at 200 characters and the body at 2,000 characters. Both limits are hard caps enforced by the composer.

The sweet spot for InMail varies by use case. For recruiting outreach: subject 40-80 characters, body 400-800. For sales outreach: subject 30-60 characters, body 500-900. For partnership inquiries: subject 50-80 characters, body 600-1,200. The InMail open rate sits at 18-25 percent across the platform, with subject line and the first preview line of the body doing most of the work to determine whether the message is opened or archived.

Hashtags — 3-5 ideal, not the maximum

LinkedIn does not enforce a strict numerical cap on hashtags per post, but the practical limit is 30 (the entire post field can hold no more, since each hashtag eats characters). The sweet spot is 3-5 hashtags per post, despite what you may have read on Instagram-focused advice sites.

The reason 3-5 works better than 8-10 on LinkedIn is that LinkedIn's algorithm uses hashtags as a topical classification signal, not as a discovery mechanism. With 3-5 specific hashtags, you give the algorithm a clear "this post is about X" signal. With 10-15 broad hashtags, you dilute the signal and look like you are spamming, which actively suppresses reach. The narrower and more on-topic the hashtags, the better the algorithm matches your post to interested feeds.

Ads — character limits by format

LinkedIn ad formats have their own character limits, distinct from organic posts. These limits change more frequently than organic limits — LinkedIn rebuilt several formats in 2024 and 2025 — so always check the current spec in Campaign Manager before launch. The numbers below are accurate as of early 2026.

The pattern across every paid format is the same: the cap is more generous than the sweet spot, and the sweet spot is determined by the preview window in the feed or inbox where the ad will actually appear. Ads that hit the cap on every field tend to feel cluttered. Ads that come in 30-50 percent under the cap feel deliberate and convert better.

Common mistakes with LinkedIn character limits

Frequently asked questions

What is the character limit for a LinkedIn post in 2026?

3,000 characters for a regular text feed post, including spaces, hashtags, and emojis. The "see more" fold appears at around 210 characters, so the first 210 do most of the work.

How long can a LinkedIn article be?

Approximately 110,000 characters in the body, which is around 18,000-20,000 words. The practical sweet spot is 800-2,000 words. The title is capped at 150 characters and works best at 50-65.

What is the LinkedIn headline character limit?

220 characters. It was 120 until late 2020. The sweet spot is 120-180 characters, with the most important words in the first 80-100 because that is what shows in most truncated previews.

How long can my LinkedIn About section be?

2,600 characters. The "see more" fold sits at 370 characters on desktop and 230 on mobile. Treat the first 230 characters as a mobile hook and aim for 1,200-2,000 characters total.

What is the limit on a connection request note?

300 characters for both free and Premium accounts. Premium does not give you more space — the field is the same. The sweet spot is 150-280 characters with a specific reference to the recipient.

How many hashtags should I use on a LinkedIn post?

3-5 specific hashtags is the sweet spot. The technical maximum is around 30 (you run out of post characters before LinkedIn caps it), but more than 5 dilutes the algorithmic classification signal and can suppress reach.

What is the character limit on a LinkedIn DM?

8,000 characters per message between connections. The sweet spot is 200-600 characters — anything past 1,000 starts to look like a sales pitch and gets archived.

How long can an InMail message be?

The subject line is capped at 200 characters and the body at 2,000. For sales outreach, the sweet spot is 30-60 characters in the subject and 500-900 in the body.

Are LinkedIn ad character limits different from organic posts?

Yes, every ad format has its own caps that are stricter than organic. Sponsored Content intro text is 600 characters, Text Ad headlines are 25, and Conversation Ad CTAs are 25. Always verify in Campaign Manager before launch.

Did LinkedIn change any character limits recently?

Several ad formats had their limits adjusted during the 2024 composer rebuild. Carousel intro text shrank to 255, Document Ad headlines were tweaked, and a few Sponsored Messaging formats had their fields reorganized. Organic post limits (3,000), articles (110,000), comments (1,250), and headlines (220) have been stable since 2020-2021.

Bottom line

LinkedIn's character limits are easy to memorize once you see them all in one place, but the limits themselves are rarely the right target. For every field that has a cap, there is a shorter sweet spot determined by where the field actually shows up — the feed truncation point, the search preview width, the mobile fold, the inbox preview line. Writing to the cap signals desperation. Writing to the sweet spot signals intent. The numbers in this guide are the limits; the second column on every list is what to actually aim for.