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Number Base Converter
Convert numbers between decimal, binary, octal and hexadecimal instantly.
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About the Number Base Converter
Converts a number between decimal, binary, octal and hexadecimal instantly — a quick helper for programming, networking and low-level debugging.
What this tool checks
- Decimal ↔ binary ↔ octal ↔ hex
- Reads any of the four bases as input
- Instant, in-browser conversion
Frequently asked questions
Why use hexadecimal?
It's a compact way to write binary — each hex digit is exactly four bits — so it's common for colours, memory and byte values.
What's octal used for?
Mostly Unix file permissions (e.g. 755); it groups bits in threes.
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