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Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal bases instantly in your browser.

Number Base Converter
Convert between binary, octal, decimal, and hexadecimal in real time.
Real-time conversionZero uploads
InputType a number
ConversionsAll bases
Binary (Base 2)—
Octal (Base 8)—
Decimal (Base 10)—
Hexadecimal (Base 16)—
ReadyBrowser only
Enter a number and select its base to convert.

How ZeroData protects your privacy

  • ✓ No Uploads: Tool input is processed in your browser and is not sent to ZeroData servers.
  • ✓ No Storage: Tool input is not saved by this website.
  • ✓ No Input Tracking: Analytics never receive the text, files, keys, or credentials you process.
  • ✓ Verifiable: Disconnect from the network after the page loads; local tool processing continues without uploading your input.

How to Use the Number Base Converter

  1. Select the base of your input number (binary, octal, decimal, or hex).
  2. Type or paste your number into the input field.
  3. View real-time conversions to all other bases.
  4. Click any output value to copy it to your clipboard.

Common Use Cases

  • Translating hexadecimal memory addresses to decimal for debugging.
  • Converting Unix file permissions between octal and binary representations.
  • Calculating subnet masks and IPv6 addresses across different bases.
  • Transforming decimal RGB color values to hexadecimal for CSS styling.
  • Analyzing binary bitwise operations in low-level programming tasks.

Frequently Asked Questions

Can this tool handle very large numbers?

Yes, our tool utilizes modern JavaScript BigInt capabilities to safely convert extremely large numbers without losing precision.

Does it support fractional numbers or decimals?

Currently, the converter is optimized for whole integers, which represent the vast majority of computing use cases.

Is my numerical data sent to a server?

No. All conversions happen locally in your browser, ensuring absolute privacy for sensitive data.

Why use hexadecimal instead of binary?

Hexadecimal is a more compact representation; one hex digit corresponds exactly to four binary bits, making it easier for humans to read.

How do I clear the inputs?

Simply delete the text in any field, and the other fields will automatically clear themselves.

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