Number Base Converter
Convert numbers between binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16). Instant bidirectional conversion.
Number bases
Numeral systems use a base to represent values. Decimal (base 10) uses digits 0–9; binary (base 2) uses 0 and 1; octal (base 8) uses 0–7; and hexadecimal (base 16) uses 0–9 and A–F.
Hexadecimal and binary are widely used in programming, memory addressing, CSS colors (e.g. #FF5733) and network protocols.
Related Tools
Base64 Converter
Encode text to Base64 or decode Base64 strings back to the original. Free online tool with no server required.
URL Encode / Decode
Encode text for safe use in URLs (percent-encoding) or decode URL-encoded strings back to the original. Processed in the browser.
Binary Code Translator
Convert text to binary code (0s and 1s) and vice versa. Supports any ASCII character. Processed in the browser.