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FIRST CH TOOLS / 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).

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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