Character Limits for Each Social Network - AiToEarn Open Platform

When scheduling posts, keep in mind that each social network has its own character limits.
The table below lists the maximum character count for common social platforms.

Platform/channel	Character limit
Facebook Pages and Groups	Post / Reel captions: 5,000 characters First comments: 5,000 characters
Instagram accounts	Post / Reel captions: 2,200 characters First comments: 2,200 characters Story captions published by notification: 120 characters
X/Twitter profiles	Free accounts: 280 characters Basic, Premium, and Premium+ accounts: 25,000 characters
LinkedIn Pages and profiles	Posts: 3,000 characters First comments: 1,250 characters
Pinterest boards	500 characters
TikTok accounts	2,200 characters
Start Pages	5,000 characters
Mastodon accounts	500 characters
YouTube Shorts	5,000 characters
Threads	Posts: 500 characters Topics: 50 characters
Bluesky	300 characters
Google Business Profiles	1,500 characters

Notes

Images may also take up character space. If the available character count goes down after you add an image, that platform counts images toward the character allowance, such as X/Twitter and LinkedIn.
When publishing through a third-party tool, some API limits may be stricter than the native platform limits.

Last modified on July 20, 2026