Numbersflags: g

Hexadecimal Number Literal

Match hexadecimal number literals like `0xFF`, `0x1A2B`, or `0XdeadBeef`.

Try it in RegexPro →

Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSupported

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic
\b0[xX][0-9a-fA-F]+\b   (flags: g)

Raw source: \b0[xX][0-9a-fA-F]+\b

How it works

\b is a word boundary so we don't match inside identifiers like `var0x10`. 0[xX] requires the literal prefix (case-insensitive on the x). [0-9a-fA-F]+ matches one or more hex digits in either case. Trailing \b avoids matching into adjacent letters.

Examples

Input

Mask = 0xFF; magic = 0xDEADBEEF;

Matches

  • 0xFF
  • 0xDEADBEEF

Input

Color #ff0000 vs literal 0xff0000

Matches

  • 0xff0000

Input

no hex here

No match

—

Common use cases

  • •Source-code analysis for magic numbers
  • •Memory-address parsing in stack traces
  • •Color-format detection
  • •Embedded / firmware tooling
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