Which number systems are supported?

This tool supports binary, octal, decimal, and hexadecimal conversions.

Does it handle very large numbers?

Yes. The converter can process large integers without losing accuracy.

Is my data stored anywhere?

No. All conversions are performed locally in your browser. No data is uploaded or saved.

Toolzium

Number Base Converter

Convert between binary, octal, decimal, hex — plus any base 2–36. Fractions supported.

Quick Convert

Instantly convert one number between any two bases.

Value

From base

To base

Uppercase letters (A–F)

Show prefixes (0b/0o/0x)

Fraction precision (digits)

Converted

0xA

Examples

10 (dec) → hex = A0x10 → dec = 1677 (oct) → binz (base36) → bin

Multi-Output

Enter one number and view it in common bases and one extra base.

Input number

From base

Auto-detect base from prefix (0b / 0o / 0x)

Output options

Fraction precision (digits)

Uppercase letters (A–F)

Show prefixes (0b / 0o / 0x)

Group integer digits

Group size

Extra target base

Standard cards show bases 2/8/10/16; add any one extra base here.

Results

Copy any representation with one click.

Enter a number above to see conversions. Tips:

Use 0b, 0o, 0x to auto-detect base.
Underscores/spaces are ignored: 1111_0000.
Fractions work: 101.101, 0xA.F.

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