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Number Base Converter for Binary, Decimal & Hex

Convert whole numbers across common programming bases without sending values to a server.

Quick answer

A number base converter translates the same integer into binary, octal, decimal, and hexadecimal forms.

It is useful for programming, debugging, docs, and data cleanup.

Best inputs

Pick the source base first

A value like 101 can mean different things in binary, decimal, or hex.

Use integers

This tool focuses on whole-number conversions, not floating-point notation.

Number input

Convert integers between binary, octal, decimal, and hexadecimal.

Try a common integer

Value

Valid integer input.

Converted values

Copy the value in the base you need for code, docs, or data cleanup.

Binary

Base 2

0b11111111

Octal

Base 8

0o377

Decimal

Base 10

Hex

Base 16

0xFF

Example

Enter decimal 255 to get binary 0b11111111, octal 0o377, and hex 0xFF.

Assumption

The input is an integer written in the base you selected.

Limitation

It does not convert fractional numbers, floating-point formats, signed byte widths, or endian-specific binary layouts.

Suggested workflow

Encoding and conversion workflow

Convert numeric bases, then encode text or generate fingerprints when preparing developer notes.

Step 1

Convert number bases

Translate integers across binary, octal, decimal, and hex.

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Step 2

Encode Base64

Encode or decode text values for transport.

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Step 3

Generate hashes

Create SHA fingerprints for exact values.

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Frequently asked questions

Which number bases are supported?

The converter supports binary, octal, decimal, and hexadecimal integers.

Can I use prefixes like 0x or 0b?

Yes. Hexadecimal can use 0x, binary can use 0b, and octal can use 0o.

Does conversion need a backend?

No. Integer parsing and conversion run locally in the browser.

Does it support fractions?

No. This tool focuses on whole-number integer conversion.