Binary
Base 2
0b1111 1111Development
Number Base Converter
Convert integers between binary, octal, decimal and hexadecimal.
Examples
Start from a common integer format.
Input
Enter an integer to convert.
Formatting
Choose how converted values are displayed.
Converted values
View the same integer represented in multiple number bases.
Octal
Base 8
0o3 77Decimal
Base 10
255Hexadecimal
Base 16
0xFFNumber details
Inspect the detected base and integer size.
Detected base
Decimal
Bits required
8
Input digits
3
Sign
Non-negative
Conversion is performed locally in your browser. Values are validated against JavaScript's safe integer range to prevent precision loss.
About this tool
What is Number Base Converter?
Convert integer values between common number bases with automatic prefix detection.
Features
Built for fast developer workflows
- Binary conversion.
- Octal conversion.
- Decimal conversion.
- Hexadecimal conversion.
- Automatic base detection.
- Negative integers.
- Digit grouping.
- Hex uppercase/lowercase.
- Safe integer validation.
- Runs locally.
Frequently asked questions
Questions about Number Base Converter
Does it support hexadecimal prefixes?
Yes. Prefixes like 0x, 0b and 0o are detected automatically.
Can I convert negative numbers?
Yes. Signed integers are supported.
Does this upload my data?
No. Everything happens locally in your browser.
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