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Number Base Converter

Convert integers between binary, octal, decimal, hex, and any base from 2–36. Edit any field — the others update live. BigInt-safe for large values.

PrivateIn your browserInstantUnlimited

Edit any field — spaces, underscores, and 0b/0o/0x prefixes are accepted.

2–36

8 bits · 1 byte(s) for the absolute value

How it works

1

Enter a value in any base

Type in binary, octal, decimal, hex, or a custom base (2–36). Changing one field recalculates the others instantly.

2

Optional formatting

Enable prefixes (0b, 0o, 0x) or digit grouping for readability. Input still accepts spaces, underscores, and prefixes.

3

Copy or download

Copy any single field, or download all bases as a text file. Bit and byte size appear under the fields.

What is a number base converter?

A number base (radix) converter rewrites the same integer using different digit alphabets — binary (0–1), octal (0–7), decimal (0–9), hexadecimal (0–9A–F), or any base up to 36. This page keeps all fields in sync in your browser; Easy24 does not receive your values.

Why use this tool

  • Binary, octal, decimal, and hex
  • Custom radix from 2 to 36
  • Live sync — edit any field
  • BigInt support for large integers
  • Optional prefixes and digit grouping
  • Unlimited use — no daily cap

Questions

What does Number Base Converter do?

It converts whole numbers between common radices (2, 8, 10, 16) and any base from 2 through 36.

Why BigInt?

JavaScript Number loses precision above 2^53−1. This tool uses BigInt so large hex or binary values stay exact.

Can I paste 0xFF or 0b1010?

Yes. Prefixes are stripped automatically when parsing binary, octal, and hex.

What is digit grouping?

It inserts spaces (or commas for decimal) so long values are easier to read. Copy uses the plain or prefixed form without requiring grouped input.

Is my input sent to a server?

No. Conversion runs entirely in this tab.

Is there a daily limit?

No. This tool has no daily cap.

Do I need an account?

No. Open the page and use it.

Does it work on a phone?

Yes. It runs in the mobile browser.

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