Number Base Converter

Translate an integer from one numeral base to another locally, covering binary, octal, decimal, hexadecimal and custom bases up to 36.

From baseTo base

Input stays in this browser.

How it works

Immediate local processing.

1. Enter your input. Paste text, a value or the data this utility expects.
2. Adjust the relevant options. The result updates locally as your input changes.
3. Copy the result. No remote conversion roundtrip is required.

Common uses

Convert UTF-8 text into 8-bit binary byte groups.

Convert UTF-8 text into hexadecimal byte values.

Beautify, minify and validate JSON without a remote call.

Decode JWT header and payload segments without claiming signature verification.

Test a JavaScript regular expression and inspect match positions and groups.

Break a URL into protocol, host, port, path, query and fragment parts.

Decode 8-bit binary byte groups as UTF-8 text.

Decode hexadecimal byte values into UTF-8 text.

Does this tool send my input to a server?

No. This utility runs on the text or values in your current browser session.

Do I need a Premier account?

No. Premier Tools can be used without signing in.