UTF-8 Byte Counter

Count UTF-8 bytes vs characters — essential for DB column and API limits.

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How to use

Paste text and click Count for the full byte breakdown. Everything runs in your browser.

Why do bytes and chars differ?

ASCII is 1 byte per char, but é is 2 bytes and 😀 is 4 bytes in UTF-8.

When does this matter?

VARCHAR(255) in MySQL counts bytes in utf8mb4, and many APIs limit payloads by bytes.

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