Number Base Converter
Free binary, octal, decimal, and hex converter for developers.
Processed locally in your browser — nothing is uploaded.
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About this tool
Convert numbers between binary, octal, decimal, and hexadecimal. Helpful for bitmasks, colors, and low-level debugging.
Frequently asked questions
- How large can numbers be?
- Conversions use BigInt-style parsing for large integer values within typical JS safe handling for digit strings.