Hex / Binary / Octal Converter
Free number base converter. Convert text or numeric bytes between text, hex, binary, octal and decimal. For low-level debugging and bit-level work.
Runs in your browserUpdated Apr 26, 2026
Input
Output
Frequently asked questions
›What number bases are supported?
Decimal (base 10), hexadecimal (base 16), octal (base 8) and binary (base 2).
›Does it handle text?
Yes — convert a text string to its byte values in any base, or convert from bytes back to text (assumes UTF-8).
›What's the largest number it handles?
Up to JavaScript's safe integer range (2⁵³). For bigger numbers, use BigInt-aware tools.
›Is my input uploaded?
No — runs entirely in your browser.
›Is the converter free?
Yes — fully free, no signup.