Base Number Converter
Convert between binary, decimal, hexadecimal, octal, and base-32 number systems.
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Binary, decimal, and hex get most of the attention, but octal and base-32 both still show up in specific, easy-to-forget places: Unix file permissions are written in octal, chmod 755 means something very different from the decimal number 755, and base-32 turns up in two-factor authentication secret keys and in ID formats designed to avoid visually confusing characters like 0 and O. This tool converts a number between all five systems, binary, octal, decimal, hexadecimal, and base-32, at once, so a permission value, an authentication secret, or a plain number all translate correctly regardless of which base it started in.
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Useful for decoding what a chmod octal value actually grants, converting a base-32 TOTP secret into a more familiar system to double-check it, or settling what an unfamiliar number actually represents across every base at once.
Key features
- Clean interface
- Fast processing
- No signup required
- Works offline