Number System Converters — Binary, Decimal, Hex
Free online number system converter — instantly switch between decimal, binary and hexadecimal numbers for programming and computer science.
Free
No registration
Instant results
Mobile friendly
Frequently Asked Questions
This category currently includes 5 free tools: Decimal to Binary, Binary to Decimal, Hex to Decimal, Roman Numeral to Number, Number to Roman Numeral.
Yes, every tool is completely free, works instantly in your browser, and requires no registration or sign-up.
No — everything runs locally in your browser. Nothing is uploaded to a server, which matters for sensitive data like tokens or credentials.
No installation is required — everything runs directly in your web browser, on desktop or mobile.