Hex to Binary Converter — Hexadecimal to Base-2 Online

What is Hex to Binary?

Hex-to-binary is a fixed 4-bit-per-digit mapping — no encoding assumption needed. This makes it a pure, unambiguous transformation, unlike text-to-binary which depends on the character encoding. The tool strips every non-hex character from the input (so '0x' prefixes, spaces, commas, newlines are all fine) then expands each hex digit to its 4-bit representation. Output grouping is your choice: 4 bits per hex char is closer to the mental model when reading hex 'digit by digit'; 8 bits per byte is closer to how the computer sees the bytes and is what most protocols document.

How to convert hex to binary online

1. 1Paste hex — any format with hex digits (0-9, a-f, A-F). Separators and '0x' prefixes are ignored.
2. 2Pick group size: 4 bits per hex char (finer) or 8 bits per byte (protocol-standard).
3. 3Copy the output — spaces separate groups for readability.

Use Cases

Tips & Best Practices

• ▸4-bit grouping (each hex char → 4 bits, spaced) is easiest to read when the input is short. 8-bit grouping matches how CPU / memory work — better for long inputs.
• ▸This tool is exact, not encoding-dependent. Text-to-binary goes through UTF-8 first; hex-to-binary just remaps digits.
• ▸For big-endian vs little-endian debates, the tool doesn't reorder bytes — it outputs bits in the same order as the input hex.