devcrate / Dev Utilities / Number Base Converter
Dev Utilities
One number, four bases.
Type a value into any of the four fields and see it converted into the other three instantly.
runs entirely in your browser — nothing is uploaded
ad slot · 336x280 in-content
How to use the number base converter
- Type a value into any field — binary, octal, decimal, or hex.
- Press Tab or click elsewhere to trigger the conversion for that field.
- All four fields stay in sync, always showing the same value in different bases.
Common values quick reference
Decimal
Equivalent
255
11111111 (bin) · 377 (oct) · FF (hex) — max value of one byte
256
100000000 (bin) · 400 (oct) · 100 (hex) — one byte plus one
65535
1111111111111111 (bin) · FFFF (hex) — max value of two bytes
16
10000 (bin) · 20 (oct) · 10 (hex)
8
1000 (bin) · 10 (oct) · 8 (hex)
Frequently asked questions about the Number Base Converter
Is my data uploaded anywhere when I use the Number Base Converter?
No. The Number Base Converter runs entirely in your browser using JavaScript — nothing you type, paste, or select is sent to any server. You can confirm this yourself by opening your browser's network tab while using it.
Is the Number Base Converter really free, and do I need an account?
Yes — the Number Base Converter is completely free, with no account, sign-up, or usage limit.
Does it work on mobile and in any browser?
The Number Base Converter works in any modern browser — Chrome, Firefox, Safari, or Edge — on desktop or mobile, since it's built with standard HTML, CSS, and JavaScript with no special requirements.