Caption length checker
Paste your caption and see its fate on every platform at once: X caps at 280 characters, Bluesky at 300 — a hard rejection, not a trim — TikTok and Instagram at 2,200, LinkedIn at 3,000. The checker counts what you pasted against each limit and shows exactly how far over you are.
0 characters
| X | 280 | fits |
| Bluesky | 300 | fits |
| TikTok | 2,200 | fits |
| 2,200 | fits | |
| Discord | 2,000 | fits |
| 3,000 | fits | |
| YouTube description | 5,000 | fits |
| 63,206 | fits |
Never checks these before every publish and shortens preserving the hook — a 301-character Bluesky post is the single most common avoidable publish failure.
Why character limits still bite in 2026
Because cross-posting is the norm and limits differ by an order of magnitude. A caption born on TikTok fails on X and Bluesky; one written for X wastes TikTok's room to hook. The checker makes the mismatch visible before posting; automatic per-platform copy makes it disappear entirely.
Read the transcript
Caption length checker Paste your caption and see its fate on every platform at once: X caps at 280 characters, Bluesky at 300 — a hard rejection, not a trim — TikTok and Instagram at 2,200, LinkedIn at 3,000. The checker counts what you pasted against each limit and shows exactly how far over you are.
Frequently asked questions
Which platform rejects captions most often?
Bluesky, in practice — 300 characters is a hard limit and most cross-posted captions are written for TikTok's 2,200. Reposting without checking is the single most common avoidable publish failure.
Should the same caption go to every platform?
Substance yes, wording no. Each platform rewards different phrasing and length; Never writes per-platform variants automatically and shortens preserving the hook when a limit forces it — see how that works on the TikTok integration.
Do emoji and links count against the limits?
Platforms count them differently — some count URLs at fixed length, emoji can count as multiple characters. The checker counts Unicode characters as platforms broadly do; when you're within 5% of a limit, shorten anyway.