Every social platform has its own character limit, and they don't exactly advertise the exact number anywhere obvious - you usually find out the hard way, halfway through typing a caption, when the text box stops accepting input or the post button grays out.

Instagram captions

Instagram allows a generous caption length - plenty of room for a real story, not just a one-liner - though in practice, most captions that actually get read in full are far shorter than the max. The first line or two is what shows before "more" truncates it in the feed, so that's the part worth writing carefully; the rest is there if people choose to expand it.

LinkedIn posts

LinkedIn's limit is also on the longer side, which fits the platform's appetite for longer-form professional posts and stories. Like Instagram, there's a preview cutoff before the "see more" link appears, so the opening lines carry the most weight for getting someone to actually click through and read the rest.

YouTube descriptions

YouTube gives you a lot of room in the description box - more than most people ever use. The part that actually matters for most creators is the first couple of lines, since that's what shows above the fold in search results and under the video before someone clicks "show more." Keywords and a clear hook belong right at the start, not buried three paragraphs down.

Why it's worth checking before you post

Getting cut off mid-sentence looks unpolished, and rewriting a caption after the fact to fit a limit you didn't know about is a waste of time you didn't need to spend. Checking the character count before you hit publish - especially for captions you're also repurposing across multiple platforms with different limits - saves that scramble.

Our Word Counter shows a live character count (with and without spaces) as you type or paste, so you can draft your caption once and immediately see whether it fits whichever platform you're posting to, without copy-pasting it somewhere else just to check.