Number Base Converter

Use the free online Number Base Converter tool. Fast, private and easy to use — runs entirely in your browser. Part of our Binary Converter Tools collection.

Text ↔ Binary

Convert text to 8-bit binary and decode binary back to readable text instantly.

Text ↔ ASCII

Turn each character into its ASCII (decimal) code and back. Useful for programming and debugging.

Text ↔ HEX

Encode text as hexadecimal byte values and decode hex back to text.

Text ↔ Octal

Convert text characters to octal code points and reverse it back to text.

Text ↔ Decimal

Map every character to its decimal Unicode code point and back again.

Number Base Converter (Bin · Oct · Dec · Hex)

Convert numbers between binary, octal, decimal and hexadecimal in any direction — perfect for programming and computer science.

Frequently Asked Questions

Is the Number Base Converter free to use?

Yes. The Number Base Converter is completely free with no sign-up, no limits and no watermarks. You can use it as many times as you like.

Is the Number Base Converter safe and private?

Absolutely. The Number Base Converter runs entirely in your browser, so your data never leaves your device and nothing is uploaded to a server.

Do I need to install anything to use the Number Base Converter?

No installation is needed. The Number Base Converter works instantly online in any modern browser on desktop, tablet or mobile.

Does the Number Base Converter work on mobile phones?

Yes. The Number Base Converter is fully responsive and works smoothly on iPhone, Android and any other device.