Social Media Character Limits 2026: The Complete Cheat Sheet
Whether you manage social media for a brand, write copy for clients or create content yourself, knowing the exact character limits for each platform is non-negotiable. Post too long and your caption gets truncated at the worst possible moment. Post too short and you leave engagement potential on the table. This 2026 cheat sheet covers everything — from the obvious (Twitter's 280-character limit) to the ones that trip people up daily (TikTok's 100-character visible hook, LinkedIn's 210-character feed preview, SMS GSM-7 vs Unicode encoding).
Instagram Character Limits 2026
Instagram remains the visual-first platform with one of the tightest effective character windows in social media. While the technical caption limit is generous, the practical limit — what actually gets seen — is far shorter.
| Field | Limit | What's visible |
|---|---|---|
| Caption | 2,200 chars | ~125 chars in feed before "more" |
| Bio | 150 chars | Full shown on profile |
| Display name | 30 chars | Full shown |
| Comment | 2,200 chars | Full shown |
| Hashtags | 30 max | 3–5 recommended in 2026 |
| Ad primary text | 125 chars | Before "more" in ad feed |
| Ad headline | 40 chars | Below image |
The 125-character hook zone is the most important number on this page for Instagram creators. Write your first 125 characters as if they were your entire caption — because for most viewers scrolling the feed, they are. Use our Instagram caption checker to see exactly where your caption gets cut off in real time.
Twitter/X Character Limits 2026
Twitter/X has maintained its 280-character standard post limit throughout 2026, though X Premium subscribers continue to enjoy a dramatically expanded 25,000-character limit for long-form posts. The platform's most misunderstood limit remains URL weighting — every link, regardless of actual length, consumes exactly 23 characters of your allowance.
| Field | Limit | Notes |
|---|---|---|
| Post (standard) | 280 chars | URLs always count as 23 chars |
| Post (X Premium) | 25,000 chars | Paid subscribers only |
| Bio | 160 chars | ~70 visible in mobile search |
| Display name | 50 chars | Full shown |
| Username (@handle) | 15 chars | Letters, numbers, underscores |
| DM message | 10,000 chars | Full shown |
| Poll option | 25 chars | Up to 4 options per poll |
Use our Twitter/X character counter to check your post length with accurate URL weighting — it automatically counts every link as 23 characters so your count is always correct.
LinkedIn Character Limits 2026
LinkedIn is the most character-limit-dense platform in this list — with separate limits for posts, headlines, the About section, connection requests, InMail, comments, experience descriptions and company pages. The B2B professional audience in the US and UK makes LinkedIn one of the highest-value platforms for content creators and marketers.
| Field | Limit | Visible before truncation |
|---|---|---|
| Post | 3,000 chars | ~210 chars in feed |
| Headline | 220 chars | ~70 chars mobile search |
| About section | 2,600 chars | ~300 chars on profile |
| Connection request | 300 chars | Full shown — keep under 150 |
| InMail body | 2,000 chars | Keep under 400 for best response |
| Post comment | 1,250 chars | Full shown |
For a full breakdown of every LinkedIn field, read our dedicated LinkedIn character limits guide or use our LinkedIn character counter which covers all five field types simultaneously.
TikTok Character Limits 2026
TikTok has become one of the most important content platforms globally, with a particularly strong audience in the UK and EU. Its character limits are among the tightest for profile fields — the 80-character bio and 30-character display name leave very little room for anything beyond the essentials.
| Field | Limit | Notes |
|---|---|---|
| Caption | 2,200 chars | ~100 chars visible in FYP feed |
| Bio | 80 chars | Profile page — full shown |
| Display name | 30 chars | Shown in feed and profile |
| @Username | 24 chars | Letters, numbers, underscores, dots |
| Comment | 150 chars | Full shown below video |
| Hashtags | 100 max | 3–5 relevant recommended |
Use our TikTok caption checker to see exactly how your caption appears in the For You Page feed before truncation, with a live mobile preview. For a full guide to TikTok limits, see our TikTok character limit 2026 guide.
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YouTube's character limits are critical for SEO as well as viewer engagement. The platform functions as a search engine — your title and description need to be optimised for keywords as well as click-through rate. The first 150 characters of your description appear in YouTube search results and function exactly like a meta description.
| Field | Limit | Visible |
|---|---|---|
| Video title | 100 chars | ~60–70 desktop, ~45 mobile |
| Description | 5,000 chars | ~150 chars in search results |
| Tags (total) | 500 chars | All tags combined |
| Comment | 10,000 chars | Full shown |
| Community post | 5,000 chars | Full shown |
| Channel description | 1,000 chars | About section |
Check your YouTube titles and descriptions with our YouTube title and description checker, which shows a live search snippet preview as you type. For a complete guide, see our YouTube character limits 2026 guide.
Facebook Character Limits 2026
Facebook's technical post limit is enormous — 63,206 characters — but the practical limit that determines whether your content gets read is just 477 characters, after which a "see more" link appears. For ad copy, the limits are far tighter and directly affect your campaign performance.
| Field | Limit | Visible |
|---|---|---|
| Post | 63,206 chars | ~477 chars before "see more" |
| Ad primary text | 125 chars recommended | ~125 before truncation |
| Ad headline | 40 chars | Below image |
| Page description | 255 chars | Full shown |
| Comment | 8,000 chars | Full shown |
SMS Character Limits 2026
SMS remains one of the highest-converting marketing channels for UK and EU businesses, but its character limits are uniquely technical. The encoding type — GSM-7 or Unicode — determines how many characters you get per segment, and getting this wrong can silently double or triple your send costs.
| Encoding | Single SMS | Multi-part per segment |
|---|---|---|
| GSM-7 (standard) | 160 chars | 153 chars |
| Unicode (UCS-2) | 70 chars | 67 chars |
A single emoji in your SMS message triggers Unicode encoding and drops your limit from 160 to 70 characters. Use our SMS character counter which highlights exactly which characters trigger Unicode encoding and shows you the segment count and estimated send cost in real time.
Quick Reference: All Platforms 2026
| Platform | Main limit | Visible hook |
|---|---|---|
| 📸 Instagram caption | 2,200 | ~125 chars |
| 𝕏 Twitter/X post | 280 | Full shown |
| 💼 LinkedIn post | 3,000 | ~210 chars |
| 🎵 TikTok caption | 2,200 | ~100 chars |
| 🎬 YouTube title | 100 | ~60–70 chars |
| 📘 Facebook post | 63,206 | ~477 chars |
| 🧵 Threads post | 500 | Full shown |
| 💬 SMS (GSM-7) | 160 | Full shown |
| 📧 Email subject | 998 (use max 50) | ~35–77 by client |
| 🎯 Google Ads headline | 30 | Full shown |
| 🔍 Meta description | 155 recommended | ~120–155 |
| 📦 Amazon title | 200 | ~80 mobile |
| 📌 Pinterest desc | 500 | ~50 in grid |
| 🎮 Discord message | 2,000 | Full shown |
| 🔔 Push notification title | 50–65 | ~30–50 on device |
For the complete interactive reference with all fields for every platform, visit our all-platforms character limit cheat sheet — with 16 platforms in one page and links to dedicated tools for each.
Why Character Limits Matter More in 2026
Platform algorithms in 2026 increasingly reward content that earns engagement within its visible window. A LinkedIn post where the visible 210 characters fail to earn the "see more" click performs significantly worse in the algorithm than one that compels readers to expand it. An Instagram caption where the hook ends mid-sentence at the 125-character truncation point loses readers who never tap "more."
Understanding truncation points — not just maximum limits — is what separates copy that performs from copy that merely fits. Every field in this guide has two numbers: the hard limit and the visible window. Both matter. The visible window is often the more important of the two.
Frequently Asked Questions
Common questions about social media character limits in 2026.