What is the character limit on X (Twitter)?

A standard post is 280 characters. Links and most emoji count toward that total, and longer posts are available to paid subscribers, but 280 is the figure to write to for the widest reach.

How long can an Instagram caption be?

Up to 2,200 characters, but only the first line or two appears before a "more" link. Put the most important words at the very start.

What is the LinkedIn post character limit?

Up to 3,000 characters, with roughly the first 140 shown in the feed before the "see more" cut-off. Lead with your hook so it lands before the break.

Do emoji and links count as characters?

Usually yes. Many emoji count as two characters, and most platforms count a link toward the limit even when it is shortened for display. Always check with a counter when you are close to the limit.

Why did Twitter have a 140-character limit?

Because it was designed to work over SMS text messages, which allow 160 characters per message. The remaining characters left room for a username, and the limit later doubled to 280.

Social Media

Social Media Character Limits: The Complete Guide

Every platform counts characters differently, and most hide your text behind a "see more" link long before the hard limit. Knowing both numbers, the limit and the cut-off, is the difference between a post that reads well in the feed and one that gets clipped mid-sentence. This guide lists the limits that matter, explains where each platform truncates, covers why the limits exist at all, and points you to a counter for each one.

X (Twitter) allows 280 characters on a standard post, Instagram captions up to 2,200, LinkedIn posts up to 3,000, TikTok captions up to 2,200, and a YouTube description up to 5,000. What matters most is the cut-off point, where text is hidden behind a "more" link.

A short history of character limits

Character limits are not arbitrary. Twitter began life with a 140-character limit because it was built to work over SMS text messages, which cap a single message at 160 characters, leaving room for a username. That constraint shaped a whole style of writing, and when the platform doubled the limit to 280 in 2017 it kept the discipline that the original limit had taught.

Other platforms set limits for different reasons: to keep feeds scannable, to stop captions from burying the content they describe, and to keep bios and headlines short enough to display on a phone. The result is a patchwork of numbers, which is why it pays to check the specific field you are writing for rather than assuming.

Character limits by platform

These are the practical limits in wide use. Platforms change them from time to time, so verify against the app before an important post:

X (Twitter): 280 characters on a standard post, with longer posts available to paid subscribers. Check yours with the X / Twitter character counter.
Instagram: 2,200 characters per caption, but only the first line or two shows before "more". Use the Instagram caption counter.
LinkedIn: 3,000 characters per post, with about 140 shown before the cut-off. See the LinkedIn post checker.
TikTok: up to 2,200 characters per caption. Try the TikTok caption counter.
Facebook: very long posts are allowed, but around 477 characters show before "see more". Check with the Facebook post counter.
YouTube: video descriptions allow up to 5,000 characters, with only the first two or three lines visible above the fold.

The number that really matters: the cut-off

The hard character limit is rarely the problem. The number that decides whether people read your post is the truncation point, the place where the platform replaces the rest of your text with a "more" link. On most feeds that sits somewhere between 125 and 250 characters, far below the actual limit.

The practical rule is to front-load. Put the hook, the offer or the key idea in the first sentence, before the cut-off, because everything after it is read only by people you have already convinced to tap "more". A strong first line is worth more than a perfect final paragraph that almost nobody reaches.

Bios, headlines and ads

Short fields are where character limits bite hardest, because every single character counts and there is no room to ramble:

Profile bios: see the social media bio counter and the Instagram bio counter.
LinkedIn headline: limited to 220 characters, and it follows you across the platform, so it is worth getting right. Check it with the LinkedIn headline counter.
Search snippets: a meta description is best kept near 150 to 160 characters so it is not truncated in results.

For any platform not listed here, the social media character counters hub collects them in one place, and the custom character limit checker lets you set any number you need.

How to write within a limit

When a post runs long, resist the urge to abbreviate everything into shorthand, which is hard to read and ages badly. Instead, cut whole ideas down to the one that matters, move supporting detail into a reply or a thread, and prefer short, common words. Remember that links and most emoji count toward the limit, and that many emoji count as two characters rather than one, so a caption that looks fine can tip over once you add a few. When you are close to a limit, a counter removes the guesswork and shows exactly where you stand as you edit.