Social Caption Length Checker
Check a caption against every platform's character limit at once.
Overview
Paste a caption or post and instantly see how it measures up against the character limit of every major social platform. Built for social media managers and copywriters drafting one piece of copy to share across X/Twitter, Instagram, Threads, Bluesky, Mastodon, LinkedIn, Facebook, TikTok, YouTube and Pinterest. It reports total characters, word count, characters excluding URLs, and an 'OVER by N' warning wherever you exceed a limit (including X's t.co 23-character link rule).