Smart Web Apps Number Base Converter
Category

Number Base Converter

Convert integers between bases (binary, octal, decimal, hexadecimal, base36). Uses BigInt for large values.

Enter an integer and choose its base, then click Convert.
Integers only. Optional prefixes: 0b, 0o, 0x when auto-detect is enabled.
Results
Formula

Tool description

This tool converts an integer value from one base into multiple output bases. It supports large integers via BigInt and avoids floating point issues.

How to use

  1. Enter your integer (for example, 255 or FF).
  2. Select the input base (or auto-detect using 0b/0o/0x prefixes).
  3. Convert to see outputs in common bases.
  4. Copy results for documentation or debugging.

Why it’s useful

  • Debug bitmasks and flags (binary/hex).
  • Convert IDs and tokens across systems.
  • Work with very large integers safely.

Use cases & interpretation

  • Protocol work: compare binary and hex representations.
  • Coding interviews: sanity-check conversions quickly.
  • Data work: convert base36 values used in compact IDs.

FAQs

No. This version supports integers only (using BigInt). Fractional base conversion requires a different approach.

It detects 0b (binary), 0o (octal), 0x (hex), otherwise defaults to decimal.
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