Free Social Media Character Counter & Limits (2026)

⚡ In short

Paste a post to see characters and words against the limits for X, Threads, Instagram, LinkedIn, TikTok, Pinterest, YouTube and Facebook. Limits change, so confirm in the platform if a post is close to the edge.

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Social media character limits

X (Twitter) post: 280 characters
Threads post: 500 characters
Instagram caption: 2,200 characters
LinkedIn post: 3,000 characters
TikTok caption: 4,000 characters
Pinterest pin description: 500 characters
YouTube title: 100 characters
YouTube description: 5,000 characters
Facebook post: 63,206 characters

Limits as commonly published in November 2026. Platforms change them, and some truncate text in feeds well before the limit, so put your key message first.

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Frequently asked questions

What is the Instagram caption limit?

2,200 characters, but only the first line or two show before the 'more' cut-off.

What is the X (Twitter) character limit?

280 characters for standard accounts.

Is my text stored?

No. The counter runs in your browser and nothing is sent anywhere.

Can AI write posts within these limits?

Yes. Socialknocks' AI agent writes posts formatted for each platform.

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Free social media character counter