Why hex shows up everywhere
Hardware docs, memory dumps, CSS colors, and IPv6 notation lean on base 16 because it lines up neatly with four-bit nibbles and byte boundaries. Converting to decimal makes the same quantity easier to compare against everyday base-10 budgets and human-friendly counts.
How this converter behaves
- Each line is converted independently—blank lines stay blank.
- Decimal output uses comma thousands separators; hex output uses a lowercase 0x prefix.
- Very large magnitudes stay exact because calculations use BigInt rather than floating point.
Related tools
Explore hex to binary, decimal to binary, and text to binary from the related tools on this page when you need bitwise or ASCII views of the same integers.
Frequently asked questions
How do I convert hex to decimal?
Multiply each hex digit by the right power of sixteen and add—this tool automates that arithmetic line by line.
Do I need to type 0x in front of hex numbers?
Optional. Both 0xFF and FF parse the same; underscores like 0xFF_FF are fine for readability.
Can this tool convert decimal back to hexadecimal?
Yes—swap the panels or edit the decimal column and the opposite side refreshes with 0x hex.
Are floating-point hex numbers supported?
No. Only integers are in scope here; use another tool if you need IEEE half or float hex strings.