Reading a hex memory address, debugging bit flags, decoding a permission octet. Base conversion comes up surprisingly often, and the ChrysoKit Number Base Converter handles it without leaving your browser.
Why use it
Operating system calculators bury base conversion under three menus. We put it on a single screen, with all four common bases visible at once.
How to use the Number Base Converter
- Type a number in any of the four input fields.
- Watch the other three update instantly.
- Use the prefix toggle to add 0x, 0b or 0o where useful.
- Copy any value with one click.
Features worth knowing
Four bases at once
Binary, octal, decimal and hexadecimal update together as you type.
Big-number support
Handles values well beyond 32-bit without losing precision.
Prefix toggle
Optional 0x, 0b and 0o prefixes for paste-ready output.
Pro tips
- When debugging bit flags, switch to binary and read the ones from right to left.
- Hex is more compact for long values; binary is clearer when the bits matter.
- Permissions like 755 are octal. Convert to binary to see the read/write/execute bits directly.
Privacy first. The Number Base Converter runs entirely in your browser. Nothing you enter is sent to a server.
Bookmark the Number Base Converter the next time a hex address makes you reach for the system calculator.
Open the tool: Number Base Converter →