Nothing kills your social media post faster than getting cut off mid-sentence because you hit the character limit. Worse, writing too much when the platform rewards brevity means your message gets lost in the noise. This comprehensive guide covers every character limit across all major social platforms, updated for 2026, along with the optimal lengths that actually perform best.
The Big Picture: Quick Reference Table
| Platform | Post Limit | Optimal Length | Username Limit | Bio Limit |
|---|---|---|---|---|
| ๐ (Twitter) | 25,000 chars | 71-100 chars | 15 chars | 160 chars |
| 2,200 chars | 125-150 chars | 30 chars | 150 chars | |
| TikTok | 2,200 chars | 100-150 chars | 24 chars | 80 chars |
| 3,000 chars | 50-100 chars (hook) | 100 chars | 260 chars (310 w/ featured) | |
| YouTube | 5,000 chars | 200 chars (title: 60) | 100 chars | 1,000 chars |
| 63,206 chars | 40-80 chars | 50 chars | 101 chars | |
| 500 chars | 100-200 chars | 30 chars | 160 chars | |
| Threads | 500 chars | 200-300 chars | 30 chars | 160 chars |
| YouTube Shorts | 100 chars | 40-60 chars | โ | โ |
| Instagram Reels | 2,200 chars | 65-100 chars | โ | โ |
Platform-by-Platform Breakdown
๐ (Twitter) โ The Expanded Playground
X raised the character limit to 25,000 for Premium subscribers and 10,000 for free accounts in 2026. But longer doesn't mean better.
Key Limits
- Regular post: 25,000 characters (Premium) / 10,000 characters (Free)
- DM: 10,000 characters
- Display: Posts over 280 characters show a truncated preview with "Show more"
- Thread tweets: Same limits apply per individual tweet
- Quote tweet: 25,000 characters for your commentary
What Actually Works
Despite the expanded limits, tweets under 100 characters get the highest engagement rate. Long-form tweets only perform well when they follow a structured format (numbered lists, clear sections). Unstructured long tweets get skipped.
๐ธ Instagram โ Caption Depth Matters
Key Limits
- Photo/Reel caption: 2,200 characters
- Bio: 150 characters
- Name field: 64 characters (this is searchable โ optimize it!)
- Alt text: 100 characters
- Hashtags: 30 per post (max 2,200 characters total)
- Story text: No strict limit, but keep under 100 characters for readability
- Comment: 300 characters
What Actually Works
Instagram shows the first 125 characters before the "more" button. Front-load your hook in those first 2 lines. Use line breaks after the hook, then elaborate below. Posts with 1,000-2,000 character captions actually see higher save rates โ saves signal value to the algorithm.
๐ต TikTok โ Shorter Wins
Key Limits
- Video caption: 2,200 characters
- Bio: 80 characters
- Username: 24 characters
- Video description (upload): 2,200 characters
- Comment: 150 characters
- DM: 300 characters
What Actually Works
TikTok captions are supplementary to the video content. Keep them under 150 characters. Use 3-5 hashtags maximum. The first 30-40 characters show in the feed โ make them count. Add a hook or question to drive comments.
๐ผ LinkedIn โ Professional Long-Form
Key Limits
- Post: 3,000 characters
- Article: 125,000 characters
- Headline: 220 characters
- Bio: 2,600 characters (summary), 260 characters (about section preview)
- Comment: 1,250 characters
- Company page description: 2,000 characters
What Actually Works
LinkedIn posts with 1,200-1,500 characters generate the most engagement. The hook must be in the first 3 lines (before "see more"). Use line breaks liberally. Personal stories and contrarian takes outperform generic advice by 5-10x.
โถ๏ธ YouTube โ Titles and Descriptions
Key Limits
- Video title: 100 characters (60 shown in search)
- Description: 5,000 characters
- Tags: 500 characters total
- Channel name: 100 characters
- Channel description: 1,000 characters
- Comment: 10,000 characters
- Shorts caption: 100 characters
- Community post: 1,000 characters
What Actually Works
Keep titles under 60 characters for full display in search results. Front-load the most important keywords. For descriptions, the first 150 characters show above the fold โ include your primary keyword and a compelling reason to watch.
๐ Facebook โ Less Is More
Key Limits
- Post: 63,206 characters
- Comment: 8,000 characters
- Bio: 101 characters
- Group post: 20,000 characters
- Ad headline: 40 characters
- Ad description: 125 characters
What Actually Works
Facebook posts under 80 characters get 60% more engagement. The platform actively deprioritizes long text posts in the feed. If you have more to say, use a carousel or link to a blog post.
๐งต Threads (Meta) โ Micro-Blogging Returns
Key Limits
- Post: 500 characters
- Bio: 160 characters
- Username: 30 characters
- Thread replies: 500 characters per post
- Quote post: 500 characters
What Actually Works
The 500-character limit forces conciseness. The best Threads posts use 200-300 characters with a clear hook, supporting context, and a question or CTA. Multi-post threads work well for deeper topics.
Additional Platform Limits Worth Knowing
| Platform | Element | Limit |
|---|---|---|
| Post title | 300 characters | |
| Post body | 40,000 characters | |
| Comment | 10,000 characters | |
| YouTube | Playlist title | 150 characters |
| Story link (link sticker) | External URL only | |
| TikTok | Video title (upload) | 150 characters |
| Newsletter title | 150 characters | |
| Pin title | 100 characters | |
| Snapchat | Display name | 30 characters |
| Status text | 700 characters | |
| Discord | Channel name | 100 characters |
| Discord | Message | 2,000 characters |
Quick Tips for Managing Character Limits
- Write first, trim second. Don't write with limits in mind โ get your thoughts down, then edit for the platform.
- Use a character counter. Risetop's Character Counter Tool shows real-time counts for all platforms simultaneously.
- Repurpose, don't copy-paste. A LinkedIn post shouldn't be the same text as an Instagram caption. Adapt the message to the platform's culture and limits.
- Test truncated previews. Always check how your post looks when cut off. The first visible line must be compelling on its own.
- Bookmark this page. Platforms change their limits regularly. We update this guide quarterly.
Never Hit a Character Limit Again
Risetop's free Character Counter tool shows real-time character counts for every social platform โ including optimal length recommendations and readability scores.
Count Characters Now โ