What is character limit?

A character limit is the maximum number of letters, numbers, spaces and symbols a social network allows in a post, caption, bio or comment.

Character limits shape how you write for each network. A message that fits easily on one platform may get cut off on another. Knowing the limits helps you avoid posts that fail to publish or end awkwardly in the middle of a sentence.

Limits differ between networks and between different parts of the same network, such as posts, bios, comments and video titles. Some networks count links, emojis or certain symbols differently. Limits also change over time, and some paid plans offer longer posts, so check each network's current rules when in doubt.

Write your core message first, then trim it for shorter platforms. Put the most important words at the start, because many networks hide longer text behind a "more" link anyway. On text-based networks with tight limits, consider a thread to share longer ideas.

Example

A tech repair shop writes a detailed LinkedIn post about phone battery care, then trims it to a short version for X and Bluesky.