Writing a social media post and not sure if it's too long? Paste your draft below and instantly see your character count for LinkedIn, Instagram, Facebook, and Twitter/X — with platform limits flagged so you don't get cut off. Works for captions, posts, bios, and comments.
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Download the free checklist →Green = under limit | Amber = within 10% of limit | Red = over limit
| Platform | Limit | Notes |
|---|---|---|
| LinkedIn post | 3,000 characters | First ~210 chars show before "see more" |
| LinkedIn headline | 220 characters | |
| LinkedIn summary/about | 2,000 characters | |
| Instagram caption | 2,200 characters | First ~125 chars show in feed |
| Instagram bio | 150 characters | |
| Facebook post | 63,206 characters | Truncated in feed after ~477 chars |
| Twitter/X post | 280 characters | |
| Twitter/X bio | 160 characters |
Limits are for standard posts. Stories, ads, and bios may differ. Check each platform's current documentation for updates.
We'll email you a practical guide covering ideal post lengths, posting frequency, and what actually drives engagement on each platform — for Australian audiences.
If you're posting consistently, the writing is often the hardest part. MarketingAI builds a 30-day content calendar — drafted in your voice, ready to post — as part of a $149 once-off setup for Australian service businesses.
Every social media platform has a character limit — and staying within it (while making the most of it) can significantly affect how your posts perform.
On Twitter/X, you have just 280 characters to make your point. Brevity is a creative constraint: punchy, direct copy tends to outperform rambling threads for most business accounts.
On LinkedIn, the 3,000-character limit is generous, but the real trick is the preview cut-off: only the first ~210 characters are visible before readers need to click "see more." Your hook must earn the click.
Instagram and TikTok both cap captions at 2,200 characters. For Instagram, the first ~125 characters appear in the feed — so lead with your strongest line. Hashtags still count toward the limit.
Facebook has a technical limit of 63,206 characters, but research consistently shows posts under 80 characters get the highest engagement. Longer posts are better suited to Facebook groups or long-form updates, not feed posts.
Use this counter to draft once and check across all platforms before you copy-paste. It saves time and catches over-limit posts before they get truncated.