The Ultimate Guide to Social Media Character Limits
Creating engaging social media content requires a balance between creative storytelling and strict technical boundaries. Every platform enforces character limits, and exceeding them can result in truncated text, broken links, or posts that simply refuse to publish.
This guide details the character limits for X, LinkedIn, Instagram, Pinterest, Threads, TikTok, YouTube, and Facebook, plus the counting mechanics that pull those numbers out from under you once your copy picks up emoji, links, or non-Latin characters.
Last verified: September 13, 2026. Platforms change these without announcement, so check the official help center before building anything that depends on an exact figure.
X / Twitter Character Limits
Twitter pioneered character-restricted copywriting, and although it has expanded, it remains highly sensitive to length, as outlined in X’s own help center.
- Standard Post: 280 characters
- X Premium Subscribers: Up to 25,000 characters (truncated with a “Show more” link after the first 280 characters)
- Direct Messages (DMs): 10,000 characters
- Profile Bio: 160 characters
- Username: 15 characters
Copywriting Pro-Tip: Keep your posts under 140 characters where you can. Compact, punchy statements generally perform well, though results vary by audience and topic, so watch your own engagement data too.
LinkedIn Character Limits
As the professional network, LinkedIn supports longer-form career posts, but keeping your posts concise prevents them from getting hidden behind the fold, per LinkedIn’s own character limit guidance.
- Standard Feed Updates: 3,000 characters
- Profile Headline: 220 characters
- About Section / Summary: 2,600 characters
- Company Page Description: 2,000 characters
- LinkedIn Articles: 110,000 characters (ideal for long-form essays)
Copywriting Pro-Tip: On LinkedIn, the “see more” link appears after roughly 140 characters on mobile and closer to 200-210 on desktop. Write your hook, the core question or value proposition, to fit within the tighter mobile budget so it holds up on every device.
Instagram Character Limits
Instagram is a visual-first platform, but captions are essential for context, brand voice, and SEO discoverability.
- Caption Limit: 2,200 characters
- Caption Truncation: Text folds with a ”… more” link after 125 characters
- Hashtag Limit: Up to 30 hashtags per post
- Bio Limit: 150 characters
- Comment Limit: 2,200 characters
Copywriting Pro-Tip: Put your most important call-to-action (CTA) or key value statement in the very first sentence. Place your hashtags and secondary details at the bottom of the caption, separated by line breaks, to maintain a clean layout.
Pinterest Character Limits
Pinterest is a search engine disguised as a social catalog. Descriptions are critical for ranking in search queries.
- Pin Description: 500 characters (roughly the first 50 characters appear as a preview)
- Pin Title: 100 characters
- Board Description: 500 characters
Copywriting Pro-Tip: Write the Pin title as a standalone phrase that makes sense with no image attached. It’s the text that carries into search results and saved boards, where the description often isn’t shown at all.
Threads Character Limits
Threads inherits Instagram’s account system but not its caption budget. Posts are short by design.
- Post Limit: 500 characters
- Bio Limit: 150 characters (shared with the Instagram account)
Threads allows chaining posts into a longer reply thread, so the 500-character ceiling is a per-post constraint rather than a per-idea one. Write each post so it survives being read alone, because that’s how they surface in feeds.
TikTok Character Limits
TikTok captions grew a long way past the platform’s early cap, so plenty of advice still circulating quotes a limit that stopped applying years ago.
- Caption Limit: 2,200 characters
- Bio Limit: 80 characters
The bio is the real constraint. Eighty characters is tighter than Instagram or X, and it’s the only place on the profile you control outright, so treat it as a headline rather than a description.
Copywriting Pro-Tip: The visible caption area over the video is a few lines at most before it collapses. The 2,200 characters exist for keywords and context; the first line is the only part most viewers read.
YouTube Character Limits
YouTube’s limits matter twice over, since titles and descriptions feed both YouTube search and Google.
- Video Title: 100 characters
- Video Description: 5,000 characters
- Description Preview: roughly the first 150 characters show above the “…more” fold, and that same opening is what tends to appear in search snippets
YouTube also cuts titles off on screen well before 100 characters, and where it cuts depends on whether the video shows up in search, a sidebar, or a phone feed. Front-load the subject.
Facebook Character Limits
Facebook’s post ceiling is so high it functions as no limit at all, which makes the truncation point the only number worth designing around.
- Post Limit: 63,206 characters
- Truncation: posts collapse behind a “See more” link after a few lines, and the exact cutoff varies by device and placement
Because the fold moves, don’t count characters here. Write the first sentence as a complete thought and assume everything after it is optional.
Why the Count in Your Head Is Wrong
A character limit reads like a simple number until your copy picks up an emoji, a link, or a language that isn’t English. Three mechanics explain most of the surprises.
Emoji rarely cost one character
Platforms disagree about what a “character” is. Unicode stores text as code points, most software measures string length in UTF-16 code units, and the two agree only across the basic multilingual range. Emoji sit outside it, so one emoji usually takes two code units. Composed emoji run up a much bigger bill. A flag is two regional-indicator symbols. A skin-toned emoji is a base plus a modifier. A family or profession emoji stitches several emoji together with zero-width joiners, so one glyph on screen can cost half a dozen units in the count.
X layers a weighted count on top of that. Characters in the common Latin and punctuation ranges count as one; everything else, emoji included, counts as two. An emoji-heavy post therefore hits X’s ceiling well before the same post hits a flat code-point limit somewhere else.
So don’t budget emoji at one character apiece, and count the draft with them in place instead of dropping them in afterwards.
Links don’t cost what they look like
X rewrites every URL through its t.co shortener and charges you for the shortened form rather than the one you typed. That cuts both ways. A long URL trailing tracking parameters costs the same as a short one, so hand-shortening links for X buys you nothing. A three-character URL still costs the full shortened length, so pasting a link into a post you already fit can blow the budget. Most other platforms count the URL as typed, which is how the same post fits on X and fails on LinkedIn, or the other way round.
Media attachments, quoted posts, and link previews tend to sit outside the count, but each platform handles them its own way. Test rather than assume.
Non-Latin scripts count differently
One Chinese, Japanese, or Korean character carries far more meaning than one Latin character, and platforms disagree about whether to charge for that. X’s weighted count bills CJK at double, which sounds punitive until you notice a 140-character Japanese post says roughly what a much longer English one does. Flat-counting platforms make no such adjustment, so the same post translated can land far under or far over its source depending on where you send it.
Accented Latin text and scripts built on combining marks behave the same way, where one visible character may be a base letter plus one or more combining code points. Whether the platform charges you once or several times depends on whether it normalizes the text first.
Writing in more than one language means counting each translation separately, because a character budget doesn’t survive translation.
Summary Cheat-Sheet
| Platform | Absolute Limit | Preview Truncation | Main Focus |
|---|---|---|---|
| X (Twitter) | 280 (25,000 for Premium) | 280 | Hook + Direct Link |
| 3,000 | ~140 (mobile) | Hook + Explanatory Body | |
| 2,200 | ~125 | Key CTA + Visual Context | |
| 500 | ~50 | Keyword SEO Rich | |
| Threads | 500 | n/a | Single Idea Per Post |
| TikTok | 2,200 (bio: 80) | First line over video | Hook Line + Keywords |
| YouTube | 5,000 (title: 100) | ~150 | Searchable Title + Opening |
| 63,206 | A few lines | Standalone First Sentence |
Utilize GlyphFlow’s built-in platform presets in your workspace to instantly select any of these boundaries. The interactive SVG ring will dynamically warn you as you approach the platform’s cut-off. For a broader look at why every character matters, see Why Your Word Counter Is More Than Just a Tally, and if you’re scripting for video, YouTube’s newer AI tools are worth a look too.