Base Converter

Convert integers between bases 2, 8, 10, and 16.

Your data stays on your deviceNo upload, no serverWorks offline

ValueFrom baseTo base

Converted value

255

Decimal preview

255

Why use this tool

Parse integers in one base and convert them to a target base.

Base Converter handles common number-base transformations.

It is useful when working across binary, octal, decimal, and hex formats.

01Enter a value and choose source/target bases.

02Copy converted output.

Confirm the input is the format you intended.

Scan the result before using it in a document, URL, config, or message.

Copy only the output you need.

Does it support negative numbers?

Yes. Signed integer values are supported.

Which bases are supported?

Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).

Can I convert very large integers?

Values within the JavaScript safe integer range (up to 2^53 - 1) are supported.

Convert plain text and binary bytes in both directions.

Convert text to hex bytes and decode hex to text.

Convert values between common length units.