What is a character counter?
A character counter counts the individual characters in a piece of text, including letters, numbers, punctuation, and spaces. Unlike a word counter, it gives you an exact byte-level breakdown of your content — useful whenever a platform or field imposes a character limit rather than a word limit.
When should you count characters?
Character limits appear everywhere: Twitter/X allows 280 characters per post, SMS messages are capped at 160 characters, meta descriptions should stay under 160 characters for SEO, and many database fields have a fixed maximum length. Knowing your exact character count prevents truncation and ensures your content fits perfectly.
Character vs word count
Word counts measure the number of whitespace-separated tokens, while character counts measure the raw length of the string. A single long technical term counts as one word but may be 20+ characters. For API rate limits, database column sizes, and UI input fields, character count is always the authoritative measure.
Common character limits at a glance
Twitter/X post: 280. SMS: 160. Meta title: 60. Meta description: 160. Google Ads headline: 30. Google Ads description: 90. Instagram bio: 150. LinkedIn summary: 2,000. YouTube video title: 100.