Hex / Decimal / Binary / ASCII Converter

Convert between number formats instantly. Supports multi-byte values with byte-by-byte breakdown.

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How to Use

Type a value in any format — the converter auto-detects and shows all representations instantly. Use the format selector to override auto-detection.

Supported input formats:

  • Hex: 0xFF, #FF, or FF
  • Decimal: 255
  • Binary: 0b11111111 or 11111111
  • ASCII: Hello

About Number Base Conversion

Number base conversion is fundamental to embedded and IoT development. BLE advertisements, GATT characteristic values, and sensor data are typically represented in hexadecimal. Converting between hex, decimal, binary, and ASCII helps debug protocol implementations and inspect raw data payloads.

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