Count String Length for Development

Database VARCHAR columns have byte limits. Use the "Bytes (UTF-8)" stat to check if a string fits in a VARCHAR(255) column — not just character count.

VARCHAR(255) stores up to 255 bytes in MySQL. An emoji (4 bytes) or accented character (2 bytes) takes more space than an ASCII letter (1 byte).

JavaScript's string.length counts UTF-16 code units, not Unicode code points. An emoji returns length 2 in JS but 1 in this tool (code point count).

Check unique character count for password strength analysis or to estimate entropy of user-generated input strings.