Byte Counter
Calculate string byte size in UTF-8, UTF-16, and other encodings online. Free byte counter for measuring text payload and storage.
Byte Size by Encoding
Encoding Notes:
- UTF-8: 1-4 bytes per character, efficient for ASCII
- UTF-16: 2-4 bytes per character, used by JavaScript/Java
- UTF-32: Fixed 4 bytes per character, simple indexing
- Emojis and CJK characters use more bytes than ASCII
About Byte Counter
Calculate the byte size of text in different character encodings. Useful for understanding string storage requirements and optimizing data transmission.
How to Use Byte Counter
Enter your values
Open Byte Counter and enter the values you want to calculate or convert.
Select units or options
Choose the input and output units, formats, or calculation parameters.
View results instantly
Results are calculated in real-time as you type — no submit button needed.
Copy or use the result
Copy the calculated result or use it directly in your work.
Frequently Asked Questions
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