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 →
Three places hex was hiding in plain sight
Number bases stop being computer-science trivia the day you notice how often hex is already in front of you, lightly disguised.
The first sighting is colour codes: #D4A373 reads as a magic token until base conversion dissolves it... D4 is 212 of 255 red, A3 is 163 green, 73 is 115 blue. A warm tan, readable directly from the numbers. Once this clicks, related skills follow free: #808080 is mid-grey by inspection (equal channels at half intensity), and darkening any colour is just subtracting across all three pairs.
The second is the MAC address on the router's label: six hex pairs, each one byte. The first three bytes encode the manufacturer... look up the prefix and that mystery device on the network identifies its maker. Wi-Fi keys, Bluetooth addresses and Ethernet diagnostics all speak the same dialect.
The third is error codes: Windows blue-screen values like 0x0000007B, HTTP debugging tools showing bytes, even file headers (the JPEG bytes FF D8 begin every photo). Engineers chose hex everywhere bytes need writing because each pair maps to exactly one byte... and once you can mentally translate a pair through binary (D4 is 1101 0100), the entire low-level layer of computing becomes legible. The converter handles the arithmetic; the habit of recognising hex contexts is what the practice builds.