How to measure text size in bytes
- Paste or type your text.
- Optionally enter a whole-number byte limit.
- Read the size report or copy it for a technical handoff.
Why bytes and characters differ
UTF-8 uses one to four bytes per Unicode code point. The letter A takes one byte, é takes two, and many emoji take four. A visible symbol can contain several code points, so code-point counts are not counts of visible characters.
What is included?
The report measures the text in this textarea using UTF-8 without a byte-order mark. Browser textareas normalize line endings to LF; a downloaded file using CRLF may be larger. UTF-16 units correspond to JavaScript string length. KiB means 1,024 bytes. This is useful for plain-text field limits, but JSON escaping, request headers, and compression can change a transmitted payload's size.
Does my input leave the browser?
The tool processes your input locally with JavaScript. No account or upload is needed.