Binary to Hex Converter
Convert binary to hexadecimal online. Separators are ignored, bits are padded to whole nibbles, with uppercase and 0x prefix options. Fast, free and private.
Hexadecimal value
1A3F
What is the Binary to Hex Converter?
The ByteTools Binary to Hex Converter condenses a string of bits into compact hexadecimal. It strips spaces, underscores and commas from the input, left-pads the bits to a whole number of 4-bit nibbles, then maps each nibble to its hex digit — an exact, lossless conversion that works on values of any length.
- Exact nibble-by-nibble conversion, any length
- Ignores spaces, underscores and commas in the input
- Automatic left-padding to a whole number of nibbles
- Uppercase / lowercase and 0x prefix options
- Shows input bit count and padding added
- 100% client-side — input never leaves your browser
How to use the Binary to Hex Converter
- 1
Paste your binary value — separators between digits are ignored.
- 2
Toggle uppercase digits and the 0x prefix to match your target format.
- 3
Read the hex result, updated live.
- 4
Copy it with one click.
About the Binary to Hex Converter
The ByteTools Binary to Hex Converter condenses a string of bits into compact hexadecimal. It strips spaces, underscores and commas from the input, left-pads the bits to a whole number of 4-bit nibbles, then maps each nibble to its hex digit — an exact, lossless conversion that works on values of any length.
Output formatting is up to you: choose uppercase or lowercase digits and add a 0x prefix when you need a copy-paste-ready literal for C, JavaScript, Python or a config file. The tool also reports how many bits you entered and how many leading zeros were added to complete the first nibble.
Everything happens 100% locally in your browser as you type. No upload, no server, no stored data.
Frequently asked questions
How do I convert binary to hex?
Group the bits into sets of four starting from the right, then replace each group with its hex digit: 1111 becomes F, 1010 becomes A. If the leftmost group has fewer than four bits, pad it with leading zeros first. This tool does the grouping, padding and mapping automatically.
Why does the converter add leading zeros?
Hex digits represent exactly four bits each, so the bit count must be a multiple of four. If you enter 10 bits, the tool adds two leading zeros to make 12 — three nibbles. Padding with zeros on the left never changes the numeric value.
Should I use uppercase or lowercase hex?
They are completely equivalent — 0xFF and 0xff are the same value. Conventions differ by ecosystem: CSS colors and most Unix tools use lowercase, while many hardware datasheets and Windows tools use uppercase. The toggle lets you match whichever style your codebase uses.
Can I paste binary that contains spaces between bytes?
Yes. Spaces, underscores, commas and line breaks are stripped before conversion, so binary copied from other tools — including grouped output like 0001 1010 — converts without any cleanup.
Is my input processed on a server?
No. The conversion runs entirely in your browser with JavaScript, updating as you type. Nothing is transmitted or stored.
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