Social Post Counter
Paste your post and the remaining length for X, Bluesky, Threads, Mastodon and Instagram lines up at a glance. No sign-up, and what you type never leaves your browser.
X follows the twitter-text weight table (U+0000-U+10FF = 1, everything else = 2, each URL a fixed 23 via t.co); Bluesky counts grapheme clusters. Based on published specs as of July 2026, so a spec change may make these differ from the real counts.
How to Use the Social Post Counter
Type or paste your post into the box above. The raw character count and the remaining length against each major network's limit update live as you type β no submitting, no buttons.
- Characters: counted as code points, so a single emoji like π is one character while a combined emoji like π¨βπ©βπ§βπ¦ is counted per component.
- Remaining: each network's limit minus the characters used. Below zero means you are over the limit.
- X (280): follows the twitter-text weight table β U+0000-U+10FF (ASCII, Cyrillic, accented Latin and more) weighs 1, everything else (Japanese and other CJK) weighs 2. Each URL counts as 23 (t.co), and a combined emoji like π¨βπ©βπ§βπ¦ counts as one visible character (weight 2).
- Bluesky (300): counted in grapheme clusters (what you see as one character), matching the official spec β π¨βπ©βπ§βπ¦ is one character.
- Threads (500) / Mastodon (500) / Instagram caption (2200): counted as code points.
The same post can fit on one network and overflow on another, because the limits differ. Click the "Long post (over on X & Bluesky)" example above: the smaller limits β X (280) and Bluesky (300) β turn red and negative, while Threads (500), Mastodon (500) and Instagram (2200) still have room to spare.
When This Comes in Handy
- Cross-posting the same text to several networks and seeing where it fits and where it overflows.
- Checking that a post with mixed full-width text fits X's 280-character limit.
- Drafting an Instagram caption with hashtags to stay within 2,200 characters.