Fydler UtilityBelt - Number Base Converter

Number Base Converter

Text & Development Tool

Number

From Base

To Base

Result

Common Number Bases

Binary (base 2): Uses digits 0-1. Used by computers.
Octal (base 8): Uses digits 0-7. Used in Unix file permissions.
Decimal (base 10): Uses digits 0-9. Standard human number system.
Hexadecimal (base 16): Uses 0-9 and A-F. Used in color codes, memory addresses.

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lucide.createIcons(); const numInput = document.getElementById('nb-input'); const fromBase = document.getElementById('nb-from'); const toBase = document.getElementById('nb-to'); function convert() { const val = numInput.value.trim(); const from = parseInt(fromBase.value); const to = parseInt(toBase.value); const result = document.getElementById('nb-output'); const error = document.getElementById('nb-error'); if (!val) { result.value = ''; error.textContent = ''; return; } try { const decimal = parseInt(val, from); if (isNaN(decimal)) throw new Error('Invalid input for base ' + from); result.value = decimal.toString(to).toUpperCase(); error.textContent = ''; } catch(e) { error.textContent = e.message; result.value = ''; } } [numInput, fromBase, toBase].forEach(el => el.addEventListener('input', convert)); document.getElementById('nb-copy-btn').addEventListener('click', () => { const v = document.getElementById('nb-output').value; if (v) { navigator.clipboard.writeText(v); showToast('Copied!'); } }); function showToast(msg) { const toast = document.getElementById('toast'); const toastMsg = document.getElementById('toast-message'); toastMsg.textContent = msg; toast.classList.add('show'); setTimeout(() => toast.classList.remove('show'), 2000); }