String Length & Byte Counter
Analyze string length in characters, bytes (UTF-8/UTF-16), words, and code points.
About the String Length Counter
Analyze string length in characters, bytes, and code points. Useful for database field sizing and API limits.
Why client-side?
Every byte you paste, type, or upload here is processed entirely inside your browser. Nothing is sent to a server, logged, or stored. That means it's safe to use this tool on production secrets, customer data, internal logs, and any input you would not paste into a hosted SaaS formatter.
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Frequently Asked Questions
- How do I find the length of a string?
- Paste your text and the tool shows the length in characters, bytes (UTF-8), and Unicode code points simultaneously.
- Why is byte length different from character length?
- Multi-byte characters like emojis or international characters take more than one byte in UTF-8 encoding, making byte length larger than character count.
- When do I need to know byte length?
- Byte length matters for database column sizing, API payload limits, file sizes, and any system that measures data in bytes rather than characters.