Number base converter
Convert numbers between binary, octal, decimal, hex and any base up to 36, including very large numbers.
Every base appears here as you type.
Type a whole number. 0b, 0o and 0x prefixes and negative numbers work.
- 1Type a number in any base.
- 2Every other base updates.
- 3Copy the one you need.
- Does my data leave my device?
- No. Everything you paste or open is processed in your browser and stays on your device.
- Does it work offline?
- Yes. Once this page has loaded, it keeps working without an internet connection.
- Is there a size limit?
- No limits from us. Very large inputs can be slow because the work uses your device's memory.
Related tasks
Ready-made settings for common jobs.
Other tools
More tools for everyday coding.