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Number Base Converter Online — Free Tool

Seamlessly convert numbers between Binary, Octal, Decimal, and Hexadecimal representations.

Supports optional prefixes: 0x, 0b, 0o.
Decimal
255
Binary
0b11111111
Octal
0o377
Hex
0xFF
Privacy note: All processing happens entirely in your browser. No data is sent to our servers.

About this tool

Number Base Converter helps developers seamlessly convert numbers between binary, octal, decimal, and hexadecimal representations. Paste your payload or source text, run the tool, and copy the output into your editor, API client, or terminal.

Everything runs locally in the browser, which keeps tokens, queries, and proprietary data off third-party servers.

How to use

  1. Paste or type your input in the tool panel above.
  2. Choose formatting or conversion options if available.
  3. Copy the output for use in your document or project.

This page is available at /tools/number-base-converter/.

Related keywords

  • base converter
  • binary to decimal
  • hex to decimal
  • octal converter
  • bin oct hex converter

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FAQ

What is Number Base Converter?

Number Base Converter is an online developer tool that seamlessly convert numbers between Binary, Octal, Decimal, and Hexadecimal representations.

How do I use the Number Base Converter?

Paste your code, JSON, token, or query into the editor, run the tool, and copy the formatted or converted result into your project.

Is this tool free?

Yes—this tool is free to use with no account required.

Does it run locally in the browser?

Yes. Calculations and transformations run in your browser—your input stays on your device.