Tweet Character Counter

How to use

1. 1Paste or type your tweet into the text box.
2. 2Watch the X (Twitter) ring update with the weighted character count and remaining budget against the 280-character free limit.
3. 3Check the cross-network panel to see whether the same text fits on Bluesky, Mastodon, Threads, X Premium, X DM, and LinkedIn.
4. 4If the message is over 280, open the thread preview, copy each numbered part, and post them one after the other.
5. 5Use the URL list to confirm which links are being shortened to 23 characters and how many weighted units the t.co rule is saving you.
6. 6Load a sample (short post, post with URL, Japanese, emoji-heavy, long thread) to see how the rules apply to common cases.

About this tool

Tweet Character Counter applies the real X (Twitter) counting rules so you know exactly when a post fits and when it does not. A plain character count is wrong on X in three ways: every URL is normalized to 23 characters because X shortens links through t.co regardless of the original length, every CJK character (Chinese, Japanese kanji and kana, Korean Hangul, fullwidth forms) counts as 2 weighted units, and every emoji also counts as 2 weighted units. This page implements all three rules using the same algorithm as the open-source twitter-text library, then reports the weighted count against the 280-character free tier, the 4000-character Premium and Premium+ tier, and the 10000-character direct message limit. URL detection follows the same permissive pattern X uses for auto-linking, including bare hosts like example.com, www. prefixes, and full https:// URLs, with trailing punctuation trimmed the way X trims it. Pasting a 200-character URL still counts as exactly 23 weighted units, so you see the post the way X sees it, not the way a plain string length sees it. The cross-network panel counts the same text under Bluesky (300 graphemes), Mastodon (500 characters on default instances), Threads (500 characters), and a long-form LinkedIn post (3000 characters), so cross-posting is no longer guesswork. When the message goes over 280, the thread preview splits it on word boundaries into 280-unit parts, attaches numbered 1 of n labels, and gives a copy button per part so you can paste each tweet without rewriting. The URL list shows every detected link with its real length next to the 23-unit t.co replacement, so you can see exactly which links are saving you space. Code point, grapheme, UTF-16, and UTF-8 byte counts are reported alongside the weighted count for anyone working across systems that measure characters differently. Everything runs locally, so a private draft never leaves your browser.

Free to use. Works in your browser. No signup, no login.