Number Base Converter — Binary, Decimal, Hex, Octal
Convert numbers between all major bases instantly
Convert between decimal, binary, octal, and hexadecimal in real-time. Free, no signup, works in browser.
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Quick Reference Table
| Decimal | Binary | Octal | Hex |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 |
| 2 | 10 | 2 | 2 |
| 4 | 100 | 4 | 4 |
| 8 | 1000 | 10 | 8 |
| 10 | 1010 | 12 | A |
| 15 | 1111 | 17 | F |
| 16 | 10000 | 20 | 10 |
| 32 | 100000 | 40 | 20 |
| 64 | 1000000 | 100 | 40 |
| 128 | 10000000 | 200 | 80 |
| 255 | 11111111 | 377 | FF |
Number Base Converter — Convert Decimal Binary Hex Octal Free Online
Convert numbers between decimal, binary, hexadecimal and octal. Essential for programming, computer science and digital electronics.
Why Use This Tool?
Get results in seconds — no waiting, no processing queue, no delays.
All processing happens in your browser. Files never leave your device.
Open the tool and use it immediately. No account or registration needed.
Not a trial, not freemium. 100% free forever with no hidden charges.
Works on desktop, tablet and mobile — iPhone, Android, any browser.
Pure browser-based tool. No software download or installation required.
How It Works
3 simple stepsEnter Your Number
Type your number into the input field and select its current base (decimal, binary, octal, or hex).
All Bases Shown Instantly
The tool simultaneously displays the equivalent value in all four number bases.
Copy Any Result
Click the copy button next to any result to copy it to your clipboard in one click.
Why Choose Number Base Converter
All 4 Bases At Once
Decimal, binary, octal, and hexadecimal shown simultaneously.
Instant Conversion
Results update live as you type — no button press needed.
Supports Hex Input
Enter hex values like FF, 1A3F directly without any prefix.
100% Browser-Based
No server calls. All math happens locally in your browser.
One-Click Copy
Copy any result with a single click.
Free Forever
No account or signup required. Unlimited use at zero cost.
Frequently Asked Questions
Your Privacy, Our Priority
We don't store any of your data or files. All files are instantly deleted after your use completes.