UUID Generator
Generate universally unique identifiers instantly with our free online tool
Popular UUID Types
Random UUID
Version 4 random UUID
Time-based UUID
Version 1 timestamp UUID
MD5 UUID
Version 3 name-based
SHA-1 UUID
Version 5 name-based
0 characters
0 UUIDs
Standard
UUID Generation Results
10 Version 4 UUIDs generated successfully
Your formatted UUID preview will appear here
✅ High-quality UUIDs generated with cryptographic uniqueness
| UUID Version | Generation Method | Use Cases | Security Level |
|---|---|---|---|
| Version 1 | Time-based with MAC address | Database keys, distributed systems | Medium |
| Version 4 | Randomly generated | General purpose, security tokens | High |
| Version 3 | Name-based with MD5 | Consistent identifiers | Medium |
| Version 5 | Name-based with SHA-1 | Consistent identifiers (secure) | High |
Benefits of Using Our UUID Generator
Instant Generation: Create UUIDs in milliseconds
Cryptographic Security: Generate cryptographically secure IDs
Multiple Versions: Support for all UUID versions
Flexible Formats: Various output formats available
Why Use Our UUID Generator?
- Free Online UUID Generation Tool
- Multiple UUID Versions Supported
- Customizable Count and Format
- Cryptographically Secure Generation
- Instant Generation
- No Registration Required
- Works on All Devices
- Copy and Download Features
- Quality Analysis Metrics
- Validation Options
💡 Pro Tip: Version 4 UUIDs are ideal for general purposes as they are randomly generated and highly unique. For consistent identifiers based on names or namespaces, use Version 3 (MD5) or Version 5 (SHA-1). Always validate UUIDs in production environments for proper format.
UUIDs generated successfully!
`;
}function copyToClipboard() {
if (generatedUuids.length === 0) {
alert('Please generate UUIDs first');
return;
}
const textarea = document.getElementById('outputUuids');
textarea.select();
textarea.setSelectionRange(0, 99999); // For mobile devices
try {
const successful = document.execCommand('copy');
if (successful) {
showNotification('UUIDs copied to clipboard!');
} else {
showError('Failed to copy UUIDs to clipboard.');
}
} catch (err) {
console.error('Failed to copy: ', err);
showError('Failed to copy UUIDs to clipboard.');
}
}function downloadUuids() {
if (generatedUuids.length === 0) {
alert('Please generate UUIDs first');
return;
}
const type = document.getElementById('uuidType').value;
const count = document.getElementById('uuidCount').value;
const blob = new Blob([generatedUuids.join('\n')], { type: 'text/plain' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = `uuids_v${type}_${count}.txt`;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
URL.revokeObjectURL(url);
showNotification('UUIDs downloaded successfully!');
}function showNotification(message) {
const notification = document.getElementById('notification');
notification.textContent = message;
notification.classList.add('show');
setTimeout(() => {
notification.classList.remove('show');
}, 3000);
}function showError(message = "Please select a UUID type.") {
const errorElement = document.getElementById('errorMessage');
errorElement.textContent = message;
errorElement.classList.add('show');
}function hideError() {
document.getElementById('errorMessage').classList.remove('show');
}function resetForm() {
// Reset form fields
document.getElementById('uuidType').value = '4';
document.getElementById('uuidCount').value = '10';
document.getElementById('uuidFormat').value = 'standard';
document.getElementById('uuidNamespace').value = 'dns';
document.getElementById('includeTimestamp').checked = true;
document.getElementById('includeVersion').checked = true;
document.getElementById('validateUuids').checked = false;
document.getElementById('generateBatch').checked = false;
// Reset output
document.getElementById('outputUuids').value = '';
generatedUuids = [];
// Reset counts
updateUuidStats([], '4', 'standard');
// Reset UI
document.getElementById('resultsContainer').style.display = 'none';
document.getElementById('previewPlaceholder').style.display = 'flex';
document.getElementById('uuidPreview').style.display = 'none';
document.getElementById('qualityInfo').style.display = 'none';
document.getElementById('uuidStats').style.display = 'none';
// Disable buttons
document.getElementById('copyBtn').disabled = true;
document.getElementById('downloadBtn').disabled = true;
// Hide progress bar
document.getElementById('progressBar').style.display = 'none';
// Hide any errors
hideError();
// Generate new UUIDs
generateUuids();
}