New
Number Base Converter
Runs in browserConvert numbers between binary, octal, decimal, and hexadecimal instantly in your browser. Free base converter online.
Number Base Converter tool
Padded binary (32-bit, unsigned): 00000000000000000000000000101010
ASCII (32–127): "*"
How to use
Enter a value
Type a number into any base field (binary, octal, decimal, or hex).
See conversions update
All other fields update instantly as you type.
Fix invalid input
If the input contains invalid digits for that base, the field will show an error.
Examples
Convert 42
Decimal 42 becomes 101010 (bin) and 2A (hex).
Input42Outputbin=101010, oct=52, dec=42, hex=2A
Frequently asked questions
- Does this tool support negative numbers?
- This converter focuses on unsigned integers. For signed formats, convert the absolute value and apply your representation rules.
- Is conversion done on a server?
- No. Everything runs locally in your browser.
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