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FIRST CH TOOLS / Text / 04 CHARACTER COUNTER

Character Counter

Paste text to instantly count characters, lines, and full-/half-width characters. Also computes the "weight" X (Twitter) uses for its post limit (CJK = 2, ASCII = 1, every URL = 23).

Your input is never stored or sent anywhere (it is gone when you close the page)
0
Characters (incl. spaces & newlines)
0
Characters (excl. spaces & newlines)
0
Full-width (CJK etc.)
0
Half-width (ASCII etc.)
0
Lines

X (Twitter) Weight

0 / 280
Weight (CJK=2, ASCII=1, URL=23)
280
Weight remaining
—
Postable?

Every URL counts as a flat 23 (t.co link shortening), regardless of its length. Emoji are approximated as weight 2. The limit for free accounts is 280 (140 CJK characters). For a highlight of the overflowing tail and a breakdown of mentions and hashtags, use X (Twitter) Post Counter, a dedicated page that reproduces X's own counting rules.

How to Use

  1. Paste your textAll numbers update the moment you type — no buttons to press.
  2. Check the countsCharacters (with/without spaces), full-/half-width, and line counts at a glance.
  3. Pre-post X checkSee the remaining weight and a postable verdict — handy for posts containing URLs.

From AI Agents

This tool's character-count, full-/half-width and X (Twitter) weight logic is also available as the count_chars tool in our MCP (Model Context Protocol) server @first-ch/tools-mcp, callable directly by AI agents with no browser needed. See Using These Tools from AI Agents for setup details.

Install

claude mcp add firstch-tools -- npx -y @first-ch/tools-mcp

Example call

# example input passed to the agent
count_chars(text="text to count")

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