Number Base Converter
Convert between binary, octal, decimal, and hex
About This Tool
Number Base Converter helps you convert between binary, octal, decimal, and hex. Common searches include number base converter, binary to decimal, decimal to hex, making it useful for quick browser-based processing and immediate results.
Common Use Cases
- Number Base Converter：Clean up copied text, code, or API data
- Number Base Converter：Convert between different encodings and representations
- Number Base Converter：Check output quickly before sharing documentation or code
Practical Tips
- Keep the original input so you can compare or revert changes
- Process very large inputs in smaller sections to reduce browser memory use
Features
- ✓Convert between binary, octal, decimal, and hex
- ✓All fields update in real time as you type
- ✓Supports arbitrary precision integers (BigInt)
- ✓One-click copy for any base
- ✓All processing done locally in browser
How to Use
- 1Enter a value in any base input field
- 2The other three bases auto-show the conversion
- 3Click the Copy button next to the desired base
- 4Switch to another base and continue — all fields update live
FAQ
Does it support negative numbers or decimals?
Integers (including negative, based on decimal negative input) are supported. Decimals and floating point are not yet supported.
How large can the number be?
JavaScript BigInt supports arbitrarily large integers — there is no practical digit limit.
Is data uploaded to a server?
No. All conversions happen locally in your browser. Nothing leaves your device.