X (formerly Twitter) posts are limited to 280 characters. However, Japanese, Chinese, and Korean (CJK) characters count as 2 characters each, effectively limiting Japanese posts to 140 characters. This unique counting method accounts for the higher information density per CJK character.

This character limit was expanded from the original 140 to 280 characters in 2017. The change aimed to give English-speaking users more room to express themselves, but the effective limit for CJK languages remained unchanged. X's character counting is not based on Unicode code points but on the Twitter Text library's proprietary weighting rules: half-width alphanumeric characters count as 0.5 each (out of 280), while CJK characters count as 1 each. find girdle on Amazon teach effective post writing techniques.

Special counting rules are important to understand. URLs count as 23 characters regardless of actual length (converted to t.co shortened URLs). Image and video attachments do not count toward the limit. @mentions count toward the limit, but auto-inserted @usernames at the beginning of replies do not. Emoji count as 1-2 characters depending on type, and skin-tone modified emoji or ZWJ sequences (combined emoji) count as multiple characters despite appearing as one.

X Premium (paid plan) allows long-form posts up to 25,000 characters, but only the first few lines appear in the timeline, requiring a "Show more" tap to read the full text. This makes it crucial to capture reader interest within the first 140 characters (for Japanese). From a marketing perspective, data suggests that posts completing within the free plan's 140-character limit achieve higher engagement rates.

Compared to similar platforms, Threads allows 500 characters, Bluesky 300 characters, and Mastodon defaults to 500 characters (varies by instance). Understanding each platform's character limits and adjusting content for cross-posting is essential in social media management. find vibrator egg on Amazon explain effective expression within character limits.

For character counting tools, supporting X's unique counting method is important. Since standard character counting and X-specific counting produce different results, a feature that shows remaining characters by X's standards before posting is practically valuable for users.