Developer

Number Base Converter

Convert bin/oct/dec/hex instantly for debugging. Processing stays on your device — no upload, no account.

How to use Number Base Converter

  1. Enter a value in any base.
  2. See live conversions in the other bases.
  3. Copy the format you need.

Why use this free number base converter tool?

  • All processing happens locally in your browser. Your files are never uploaded to a server.
  • Binary, octal, decimal, hex.
  • BigInt-safe for large integers.
  • One-click copy.

Technical details

Uses BigInt parsing so values beyond Number.MAX_SAFE_INTEGER still convert correctly.

Number Base Converter FAQ

Is input uploaded?

No. All processing happens locally in your browser. Your files are never uploaded to a server.

Floats?

This tool targets integers.

0x prefix?

Hex accepts optional 0x; binary optional 0b.

Negative numbers?

Leading minus is supported for signed integers.

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