Number Base Converter
Get binary, octal, decimal and hexadecimal values as you type.
FREE - NO SIGN-UP - RUNS ON YOUR DEVICE
Your entries stay on your device
- Liveupdates as you type
- 0data uploaded
- 1clear result
- Freeno account needed
What you can count on
- 0data sent
- Calculations run in this browser
- Entries stay on this device
- Liveresult
- Figures update as values change
- Copy the summary when ready
- Clearmethod
- Inputs and method shown
- Readable output for copying
Number Base Converter at a glance
- Input
- An input base and a whole number
- Output
- Binary, octal, decimal and hex at once
- Processing
- Runs locally in your browser
- Bases and size
- Base 2/8/10/16, any length
- Price
- Free
- Account required
- No
How to use Number Base Converter
- 1
Enter your values
Choose the input base and enter a non-negative whole number.
- 2
Read the result
See binary, octal, decimal and hexadecimal update together.
- 3
Copy the result
Use Copy result to save the displayed summary for your own notes.
Frequently asked questions
How is the result calculated?
The tool uses the unit factors or browser date APIs described in the interface, then updates the output whenever an input changes.
Are my entries uploaded?
No. The calculation runs in your current browser tab, and the tool does not send the values to a server.
Why might my result differ elsewhere?
Rounding, unit definitions and local time-zone rules can vary. Check the selected input type and units before copying the result.
Can I paste a value that starts with 0x?
Yes. A leading 0x is stripped before the digits are read, so pasting 0xFF straight from code works without editing it first.
Understanding the estimate
Choose the input base and enter a non-negative whole number. See binary, octal, decimal and hexadecimal update together. Everything runs in the current browser tab.
- The result follows the method named in the tool and rounds figures for easy reading.
- Inputs remain in the browser tab, and the displayed result is ready to copy.
Full specification
| Input | Choose the input base and enter a non-negative whole number. |
|---|---|
| Output | See binary, octal, decimal and hexadecimal update together. |
| Processing | All calculations run locally in the current browser tab. |
| Bases and size | Input base is 2, 8, 10 or 16 — no base 32 or 36. Whole numbers of any length stay exact, past the 53-bit limit. |
| Price | Free |
| Account required | No |
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