Tools/Number Base Converter
Encoding & Conversion

Number Base Converter

Type a number in any base and see it instantly converted to every other common base, with automatic 0x/0b/0o prefix detection.

Free & unlimitedRuns in your browserNo sign-up required
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How it works

Three steps, no setup

1

Enter a number

Include a prefix like 0x or 0b if you want the base auto-detected.

2

Pick the source base

Or let the tool infer it from the prefix you typed.

3

Read every conversion

Binary, octal, decimal, hex and base-36 are all shown at once.

Common questions

Frequently asked questions

What bases are supported?
Any base from 2 to 36, covering everything from binary and octal up to full alphanumeric base-36.
How is 0x1F auto-detected?
The 0x, 0b, and 0o prefixes are recognised automatically and stripped before parsing the digits that follow.
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