The Complete Social Media Character Limit Guide (2026) — Every Platform, Every Field

If you write content for social media, you have hit a character limit at the worst possible moment. A caption that gets cut off. A bio that will not save. An ad headline that exceeds the limit by one word.

This guide fixes that permanently.

We have compiled every social media character limit for every major platform in 2026 — not just the headline numbers, but every field on every platform: posts, bios, usernames, comments, ads, stories, and more. Updated for 2026, verified across multiple sources, and organised so you can find exactly what you need in seconds.

Bookmark this page. It is the only reference you will ever need.

---

Master Comparison Table: Social Media Character Limits 2026

Platform	Post / Caption	Bio	Username	Comment
Twitter / X (Free)	280	160	15	280
Twitter / X (Premium)	25,000	160	15	25,000
Instagram	2,200	150	30	2,200
Facebook	63,206	101 (personal) / 255 (page)	75	8,000
LinkedIn	3,000	2,600	60	1,250
TikTok	4,000	80	24	150
YouTube	5,000 (description)	1,000	20	10,000
Pinterest	500 (pin desc)	160	30	N/A
Threads	500	150	30	500
Snapchat	250 (story)	80	15	N/A
Reddit	40,000 (post)	200	20	10,000
Discord (Free)	2,000	190	32	2,000
Discord (Nitro)	4,000	190	32	4,000
WhatsApp	65,536 (message)	139	N/A	N/A
Telegram	4,096	70	32	4,096
Bluesky	300	256	18	300
Mastodon	500	500	30	500

---

Why Social Media Character Limits Matter

Character limits are not just technical constraints — they shape how we communicate, what we say, and whether our message gets seen at all.

Truncation kills your message. Most platforms show only a fraction of your content before adding a “see more” button. On Instagram, that is 125 characters. On LinkedIn, it is 210. On TikTok, it is 100–150. Everything past that threshold requires an extra tap — and most users never tap.

Ad limits cost real money. A Facebook ad primary text truncated at 125 characters means your offer never reached your audience. A Google ad headline over 30 characters gets cut off mid-word in search results.

Algorithms respond to completion. Content that fits cleanly within visible limits — without the “more” button — tends to generate higher engagement because the full message is immediately readable.

Knowing the limits lets you write with intention. When you know you have 125 visible characters on Instagram, you stop burying your hook. When you know LinkedIn shows 210 characters before truncation, you put your most compelling sentence first.

---

Twitter / X Character Limit

Complete Twitter / X Limits (2026)

Field	Character Limit
Post (Free tier)	280 characters
Post (X Premium)	25,000 characters
Bio	160 characters
Display name	50 characters
Username (@handle)	15 characters
Direct Message	10,000 characters
Community post	280 characters

Key Twitter / X character rules

URLs always count as 23 characters regardless of their actual length. A short link and a 200-character URL both consume exactly 23 characters.

Emojis count as 2 characters on Twitter. This catches many users off guard — a tweet with several emojis can hit the limit faster than expected.

Images, videos, and GIFs do not count toward the character limit.

X Premium subscribers get 25,000 characters per post, though the first 280 characters show in the feed — everything beyond that sits behind a “show more” prompt.

What 280 characters looks like in practice

280 characters is roughly 40–50 words — enough for a complete thought, a question, a short list, or a strong opinion. Twitter’s limit is not a restriction so much as a discipline: it forces every word to earn its place.

---

Instagram Character Limit

Complete Instagram Limits (2026)

Field	Character Limit	Visible Without Tap
Caption	2,200 characters	~125 characters
Bio	150 characters	Full bio shown
Display name	30 characters	Full name shown
Username	30 characters	Full username shown
Comment	2,200 characters	Full comment shown
Hashtags per post	30 maximum	Counted in caption
Story text overlay	~200 characters readable	Full overlay shown
Alt text (images)	100 characters	Not visible to users

The 125-character rule

Only approximately 125 characters of your Instagram caption are visible in the feed before the “more” link appears. This is the most important number in Instagram content strategy.

Your first 125 characters should contain:

• Your hook or most compelling statement
• The core value of the post
• Ideally, a reason to keep reading

Everything after 125 characters is supporting content — context, hashtags, calls to action — that engaged readers will see after tapping.

Instagram bio strategy

With 150 characters, your bio needs to communicate four things: who you are, what you post, who it is for, and what to do next. Use line breaks (drafted outside the app and pasted in) to create visual structure within those 150 characters.

---

Facebook Character Limit

Complete Facebook Limits (2026)

Field	Character Limit	Visible in Feed
Personal post	63,206 characters	~480 characters
Page post	63,206 characters	~480 characters
Comment	8,000 characters	Full shown
Personal bio	101 characters	Full shown
Page short description	255 characters	Full shown
Group description	3,000 characters	Partial
Event description	64,000 characters	Partial
Ad primary text	2,200 characters	~125 visible
Ad headline	40 characters	Full shown
Ad link description	30 characters	Full shown
Carousel ad headline	40 characters	Full shown
Story ad text	90 characters recommended	Full shown
Messenger message	20,000 characters	Full shown

Facebook post length strategy

The technical limit of 63,206 characters is essentially unlimited for practical purposes. What matters is what Facebook’s algorithm and users respond to.

Posts under 80 characters consistently generate the highest engagement on personal profiles. Page posts perform well in the 100–250 character range. Long-form posts (500+) work when the content genuinely earns the length — stories, case studies, detailed updates.

Facebook Ads: the 125-character threshold

For advertisers, 125 characters is the most critical number on Facebook. This is how much primary text is visible in the feed before the “See More” link. Your entire offer, benefit, and hook must land within those 125 characters.

---

LinkedIn Character Limit

Complete LinkedIn Limits (2026)

Field	Character Limit	Visible in Feed
Feed post	3,000 characters	~210 characters
Article	125,000 characters	Full on article page
Article title	150 characters	Full shown
Headline	220 characters	Full shown
About / Bio section	2,600 characters	~300 visible
Comment	1,250 characters	Full shown
Connection request	300 characters	Full shown
Company page description	2,000 characters	Partial
InMail subject	200 characters	Full shown
InMail body	1,900 characters	Full shown

LinkedIn’s 210-character rule

LinkedIn truncates feed posts after approximately 210 characters — the shortest visible preview of any major professional platform. This makes the opening two sentences of every LinkedIn post critically important.

The posts that perform best on LinkedIn front-load a pattern interrupt or bold statement in the first line, then break immediately — creating visual space that makes the “see more” tap feel worthwhile.

LinkedIn headline as an SEO field

Your LinkedIn headline (220 characters) is indexed by both LinkedIn’s internal search and Google. Including your professional keywords here — your role, niche, and specialisation — increases your discoverability to recruiters, clients, and collaborators searching for those terms.

---

TikTok Character Limit

Complete TikTok Limits (2026)

Field	Character Limit	Visible in Feed
Video caption	4,000 characters	~100–150 characters
Profile bio	80 characters	Full shown
Username	24 characters	Full shown
Display name	30 characters	Full shown
Comment	150 characters	Full shown
Hashtags per post	30 maximum	Counted in caption

TikTok’s search engine evolution

TikTok expanded its caption limit from 300 to 2,200 and then to 4,000 characters as it evolved into a search platform. By 2026, a significant portion of younger users use TikTok as their primary search engine for recommendations, tutorials, and local information.

This means longer, keyword-rich captions have measurable SEO value on TikTok — not just for engagement, but for appearing in TikTok search results for relevant queries.

Despite the 4,000-character limit, only 100–150 characters are visible before the “more” button. The opening lines of your caption are your hook — the rest is searchable context.

TikTok’s tightest limit: comments at 150 characters

TikTok comments are intentionally short at 150 characters — the tightest comment limit of any major platform. This shapes TikTok’s comment culture toward reactions, short responses, and emoji conversations rather than extended discussion.

---

YouTube Character Limit

Complete YouTube Limits (2026)

Field	Character Limit	Visible Without Click
Video title	100 characters	~60–70 characters
Video description	5,000 characters	~157 characters
Comment	10,000 characters	Full shown
Channel description	1,000 characters	~200 in search results
Tags (total)	500 characters	Not visible to users
Community post	5,000 characters	Partial
Playlist title	150 characters	Full shown
Playlist description	5,000 characters	Partial

YouTube title optimisation

YouTube recommends keeping titles under 60–70 characters for full visibility across all placements — search results, suggested videos, mobile feeds, and browse features. Titles over 70 characters get truncated with an ellipsis.

Your primary keyword should appear in the first 5 words of your title. This is the highest-weight text field for YouTube search — it is to YouTube SEO what the title tag is to Google SEO.

YouTube description: 157 characters before the fold

Only approximately 157 characters of your video description are visible below the player before the “Show more” button appears. This is where your call to action, primary keyword, and most important link should live.

The remaining 4,843 characters of your description are indexed by YouTube and Google for search ranking — use them for full video transcripts, chapter markers, related links, and secondary keywords.

---

Pinterest Character Limit

Complete Pinterest Limits (2026)

Field	Character Limit	Visible in Feed
Pin description	500 characters	~50–60 characters
Pin title	100 characters	~40 characters
Board name	50 characters	~30–35 characters
Board description	500 characters	Not shown in feed
Profile bio	160 characters	Full shown
Username	30 characters	Full shown
Display name	30 characters	Full shown
Hashtags per pin	20 maximum	Counted in description
Alt text	500 characters	Not visible to users

Pinterest is a search engine — write accordingly

Pinterest is fundamentally different from every other platform in this guide. It is a visual search engine — not a social network. Character limits here serve SEO, not social engagement.

Your pin title and description are the primary signals Pinterest uses to match your content to search queries. Keywords placed naturally in your title (especially in the first 5 words) and description significantly impact how many people discover your pins.

Only 50–60 characters of your pin description are visible in the feed — but the remaining 440 characters are fully indexed for search. Write the visible section as a hook and the rest as keyword-rich context.

---

Threads Character Limit

Complete Threads Limits (2026)

Field	Character Limit
Post	500 characters
Reply	500 characters
Bio	150 characters
Username	30 characters
Links per post	Up to 10

Threads positioning in 2026

Threads launched in July 2023 as Meta’s Twitter/X alternative and has grown into a genuine text-first platform for creators, journalists, and brands. Its 500-character limit positions it comfortably between Twitter’s tight 280 and LinkedIn’s generous 3,000.

Threads is connected to Instagram — your username and bio are shared across both platforms. Any changes to your Instagram bio automatically update your Threads bio.

---

Snapchat Character Limit

Complete Snapchat Limits (2026)

Field	Character Limit
Snap caption	80 characters
Story caption	250 characters
Bio	80 characters
Username	15 characters
Display name	30 characters
Chat message	No strict limit

Snapchat’s ultra-tight limits

Snapchat operates with some of the tightest text limits of any platform — reflecting its identity as a visual-first, ephemeral medium. The 80-character snap caption enforces extreme brevity: one sharp, punchy line per image or video.

---

Reddit Character Limit

Complete Reddit Limits (2026)

Field	Character Limit
Post title	300 characters
Text post body	40,000 characters
Comment	10,000 characters
Username	20 characters
Subreddit name	21 characters
User flair	64 characters
Community description	500 characters
Community sidebar	10,240 characters

Reddit’s 300-character title limit

Reddit post titles are limited to 300 characters — more generous than most platforms. However, the most successful Reddit titles tend to be significantly shorter: clear, specific, and either informative or curiosity-driven.

Reddit’s culture rewards substance. The title gets you the click; the content earns the upvotes.

---

Discord Character Limit

Complete Discord Limits (2026)

Field	Free	Nitro
Message	2,000 characters	4,000 characters
Bio / About me	190 characters	190 characters
Username	32 characters	32 characters
Server name	100 characters	100 characters
Channel name	100 characters	100 characters
Channel topic	1,024 characters	1,024 characters
Nickname	32 characters	32 characters
Role name	100 characters	100 characters

---

WhatsApp Character Limit

Complete WhatsApp Limits (2026)

Field	Character Limit
Message	65,536 characters
Status update	700 characters
Bio / About	139 characters
Group name	100 characters
Group description	512 characters
Broadcast list name	25 characters

WhatsApp’s practical limits

WhatsApp’s 65,536-character message limit is so generous it is functionally unlimited for any personal or business communication use. The limit that actually matters for most users is the 700-character status update — WhatsApp’s version of a story caption.

---

Telegram Character Limit

Complete Telegram Limits (2026)

Field	Character Limit
Message	4,096 characters
Bio	70 characters
Username	32 characters
Group / Channel name	255 characters
Group / Channel description	255 characters
Caption (media)	1,024 characters
Poll question	255 characters

---

Bluesky Character Limit

Complete Bluesky Limits (2026)

Field	Character Limit
Post	300 graphemes
Bio	256 characters
Display name	64 characters
Username / Handle	18 characters
Alt text	2,000 characters

What is a grapheme?

Bluesky measures posts in graphemes rather than characters. A grapheme is what humans perceive as a single visual unit — a letter, an emoji, or a complex Unicode symbol. A single family emoji (👨‍👩‍👧‍👦) counts as 1 grapheme even though it is technically several unicode characters joined together.

In practice, for standard English text, 1 grapheme = 1 character. The distinction matters for emoji-heavy posts and non-Latin scripts.

---

Mastodon Character Limit

Complete Mastodon Limits (2026)

Field	Character Limit
Post (default)	500 characters
Bio	500 characters
Display name	30 characters
Content warning / Subject	500 characters

Important note: Mastodon is a decentralised platform where individual server instances can set their own character limits. The 500-character default is the most common, but some instances allow significantly more. Always check the specific instance you are using.

---

Character Limits That Catch People Off Guard

After covering 14 platforms in detail, here are the limits that most commonly surprise content creators and marketers:

TikTok comments: 150 characters The platform with the longest caption limit (4,000) has the shortest comment limit of any major platform.

LinkedIn visible preview: 210 characters LinkedIn posts can be 3,000 characters but only 210 show in the feed. Most LinkedIn users never see past the first two sentences.

Facebook ad primary text: 125 visible With an average CPC of $7+ in competitive niches, getting truncated before your offer lands is an expensive mistake.

Instagram bio: 150 characters Tighter than Twitter’s bio (160 characters) despite Instagram posts being significantly longer.

Pinterest pin description: 50–60 visible Despite a 500-character limit, your pin shows fewer visible characters in the feed than a tweet.

Telegram bio: 70 characters One of the tightest bio limits of any platform — less than half of Twitter’s 160.

---

How to Never Exceed a Character Limit Again

The only way to consistently stay within character limits across every platform is to count before you post.

Rather than counting in your head or pasting into a platform only to find your text is too long, use a dedicated character counter tool as part of your writing workflow:

1. Write your caption, bio, or post in a character counter tool first
2. Check the count against the platform’s limit (refer to the tables above)
3. Adjust your text until it fits — both the full limit and the visible preview limit
4. Copy and paste the final version directly into the platform

Use the TextCharacterCounter tool to count characters, words, sentences, and reading time in real time. The Social Media preset shows you exactly where you stand against the most common platform limits as you type — no manual checking required.

---

Social Media Character Limits: Quick Cheat Sheet

Print this or save it for your workflow:

Tightest limits (under 200 characters visible):

• Twitter/X: 280 (full post)
• TikTok comment: 150
• Instagram visible preview: ~125
• Snapchat caption: 80
• TikTok bio: 80
• Telegram bio: 70

Mid-range limits (200–500 characters):

• LinkedIn visible preview: ~210
• Threads post: 500
• Mastodon post: 500
• Pinterest description visible: ~50–60
• Reddit title: 300
• Bluesky post: 300

Generous limits (500+ characters):

• TikTok caption: 4,000
• YouTube description: 5,000
• Facebook post: 63,206
• WhatsApp message: 65,536
• LinkedIn article: 125,000

---

Frequently Asked Questions

Complete Social Media Character Limit Guide.