toolsko

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String Length & Byte Counter (UTF-8)

Count characters, bytes (UTF-8 / UTF-16), code points and SMS parts — useful for database and API limits.

Tool inputs stay in your browser · optional AI search sends your query

Good to know: Databases and APIs often limit size in bytes, not letters. "ñ" is 1 letter but 2 bytes; an emoji can be 4 bytes and count as 2 in JavaScript.

How to use it (step by step)

  1. 1Type or paste your text into the “Text” box. There is already an example in it so you can see how it works; press Clear to start with your own.
  2. 2The answer appears right away in the “Counts” box. No button needed.
  3. 3Press Copy and paste the result wherever you need it.

Words to know

cURL / API request
cURL sends a request to a web address from the command line. APIs are web addresses that return data for programs.
Unicode / UTF-8
Unicode gives every character (A, ñ, ₱, 😀) a number. UTF-8 is how those numbers are stored as bytes.
Byte
The basic unit of computer storage. One basic letter = 1 byte in UTF-8; ñ = 2 bytes; most emoji = 4 bytes.

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