String Length Calculator
Measure a string precisely: total characters, characters without spaces, UTF-8 byte length, words and lines, all updating live as you type. Developers need exact lengths when a database column, an API field, an SMS message or a meta tag has a hard limit, and the difference between character count and byte count matters because emoji and non-Latin characters take more than one byte. This tool shows the JavaScript length, the true code point count, and the number of bytes the string occupies when encoded as UTF-8, so you can size fields correctly. It is a quick, reliable reference when you are validating input or debugging an off by one truncation. Everything runs in your browser, so the text you paste stays private on your own device.
How to use String Length Calculator
- Paste or type your text.
- Read the character, byte, word and line counts.
- Use the counts to check limits or encoding size.
Frequently asked questions
What counts does it show?
It reports characters, UTF-8 byte length, word count and line count, with character counts both including and excluding spaces.
Why do bytes differ from characters?
In UTF-8 a character can take one to four bytes, so text with accents or emoji has more bytes than characters. The byte count matters for storage and size limits.
How does it count words?
Words are counted as runs of non-whitespace characters separated by spaces or line breaks.
What is String Length Calculator?
Measure a string precisely: total characters, characters without spaces, UTF-8 byte length, words and lines, all updating live as you type. Developers need exact lengths when a database column, an API field, an SMS message or a meta tag has a hard limit, and the difference between character count and byte count matters because emoji and non-Latin characters take more than one byte.
Is String Length Calculator free to use?
Yes. String Length Calculator is completely free, with no sign-up and no usage limits.
Does String Length Calculator work in a web browser?
Yes. String Length Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with String Length Calculator?
Yes. String Length Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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