Number Base Converter

What Number Base Converter does

Convert integers between binary, octal, decimal, hexadecimal and other supported positional number bases.

Worked example

How it works

A positional numeral represents each digit as a coefficient multiplied by a power of its base. Conversion parses the source digits, then repeatedly divides or expands the value in the destination base.

Developer workflows

• Convert values used in code and network documentation
• Check binary and hexadecimal exercises
• Inspect flags, masks and encoded identifiers

Security and compatibility checks

• Every digit must be valid in the selected source base.
• Negative signs and fractional values depend on the supported mode.
• Very large values may exceed ordinary JavaScript integer precision unless arbitrary-precision arithmetic is used.

Frequently asked questions

Why is hexadecimal useful in programming?

One hexadecimal digit represents four binary bits, making long binary values easier to read.

Is 10 the same value in every base?

No. The text 10 represents the base itself: two in binary, eight in octal, ten in decimal and sixteen in hexadecimal.

Why can a large converted integer lose precision?

Values beyond JavaScript’s safe integer range can be rounded; verify very large identifiers with an arbitrary-precision workflow.