What is the Number Base Converter tool?

Convert numbers between any bases 2–36. This free online tool is available at NumbersChecker with no login required.

Is the Number Base Converter tool free?

Yes, the Number Base Converter tool is completely free to use at NumbersChecker. No account or installation is needed — results are instant.

How do I use the Number Base Converter tool?

Enter your input into the form at https://numberschecker.com/tool/base-converter, click Run, and the result appears instantly. Click any result value to copy it to your clipboard.

Is there an API for the Number Base Converter tool?

Yes. Send a POST request to https://numberschecker.com/api/base-converter with your input as a JSON body. The API is free and requires no authentication.

Numbers binaryhexoctaldecimal

Number Base Converter

Convert numbers between any bases 2–36.

About the Number Base Converter Tool

Convert numbers between any bases 2–36. This free online tool runs entirely in your browser — no login, no installation, and no data is stored.

This tool is part of the Numbers category on NumbersChecker. Browse all Numbers tools or explore all 139 tools.

Related: binary · hex · octal · decimal

API usage

POST /api/base-converter
Content-Type: application/json

{
  "number": "255",
  "fromBase": 10
}