UUID Generator
Generate UUIDs instantly with support for v1, v4, v5, bulk generation up to 10,000, and custom formats. 100% private, works offline.
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Security & Privacy
- Cryptographically secure random generation using Web Crypto API
- 100% client-side - no data sent to servers
- History stored only in your browser session
Pro Features
- Generate up to 10,000 UUIDs at once
- All UUID versions (v1, v3, v4, v5, GUID, Nil)
- Custom formats and namespace support
- Export to TXT, JSON, CSV, SQL
- Collision detection and analysis
Why Choose Filator's UUID Generator?
Bulk Generation
Generate up to 10,000 UUIDs at once - 10x more than competitors. Instant results with no waiting.
Cryptographically Secure
Uses Web Crypto API for true randomness. Bank-level security with 100% client-side processing.
All UUID Versions
Support for v1, v3, v4, v5, GUID, and Nil UUID. Namespace UUIDs and custom format templates.
How to Generate UUIDs Online for Free
Filator's free UUID generator lets you create universally unique identifiers instantly in your browser - supporting all UUID versions (v1, v3, v4, v5), bulk generation up to 10,000 UUIDs, and custom formats. Unlike UUIDGenerator.net (no bulk limit specified), UUIDTools.com (100 max with rate limiting), and GUIDGenerator.com (1,000 max), Filator processes everything locally with no server limits or restrictions.
Why Choose Filator's UUID Generator?
🚀 Bulk Generation Up to 10,000
Generate 10,000 UUIDs in a single batch - significantly more than UUIDTools.com (100 max) and GUIDGenerator.com (1,000 max). Perfect for database seeding and large-scale projects.
🔐 Cryptographically Secure
Uses Web Crypto API (crypto.getRandomValues()) for UUID v4 generation. Bank-level security with true randomness, not pseudo-random like some competitors.
🔒 100% Private
All UUID generation happens client-side in your browser. Your data never leaves your device - no server uploads, no tracking, no rate limiting like UUIDTools.com.
📊 Multiple Export Formats
Export UUIDs to JSON, CSV, XML, or SQL format. Custom templates for uppercase, braces, Base64, URN format, and more.
How to Generate UUIDs
- 1.Select your UUID version: v4 (random, most common), v1 (timestamp), v3/v5 (namespace), or GUID
- 2.Choose the quantity - generate 1 to 10,000 UUIDs at once
- 3.Optionally customize the format (uppercase, braces, no hyphens, Base64, etc.)
- 4.Click "Generate" to create your UUIDs instantly
- 5.Copy individual UUIDs, copy all, or export to JSON/CSV/XML/SQL
UUID Versions Explained
| Version | Method | Best For |
|---|---|---|
| UUID v4 | Random (122 bits) | Most applications, database keys |
| UUID v1 | Timestamp + MAC | Time-ordered events, logs |
| UUID v3 | MD5 hash of namespace + name | Deterministic IDs (legacy) |
| UUID v5 | SHA-1 hash of namespace + name | Deterministic IDs (recommended) |
| GUID | Microsoft format | .NET, SQL Server, Windows |
| Nil UUID | All zeros | Null placeholder, default value |
Filator vs Competitors
| Feature | Filator | UUIDGenerator.net | UUIDTools.com | GUIDGenerator.com |
|---|---|---|---|---|
| Bulk Limit | 10,000 | Unspecified | 100 | 1,000 |
| Rate Limiting | None | Unknown | Yes (1 min wait) | None |
| UUID Versions | v1, v3, v4, v5, GUID, Nil | v1, v4, v7 | v1-v5 | GUID only |
| Export Formats | JSON, CSV, XML, SQL | Download only | API | Copy only |
| Works Offline | Yes (PWA) | No | No | No |
Advanced Features
- • Namespace UUIDs: Generate deterministic v3/v5 UUIDs using DNS, URL, OID, or X500 namespaces
- • Custom Formats: Uppercase, lowercase, with/without braces, no hyphens, Base64, URN format
- • Prefix/Suffix: Add custom prefixes or suffixes to generated UUIDs
- • Collision Detection: Real-time detection if duplicate UUIDs are generated
- • Virtual Scrolling: Handle 10,000+ UUIDs without performance issues
- • Generation History: Access previously generated UUID batches
- • Import UUIDs: Import existing UUID lists for validation or deduplication
- • PWA Support: Install as app and generate UUIDs offline
Common Use Cases
🗄️ Database Primary Keys
Use UUIDs as primary keys in distributed databases where auto-increment is not feasible. Perfect for PostgreSQL, MySQL, MongoDB.
🔑 API Keys & Tokens
Generate unique API keys, session tokens, and authentication identifiers with cryptographic security.
📁 File & Resource IDs
Create unique identifiers for uploaded files, media assets, and resources in cloud storage systems.
🌐 Distributed Systems
Generate unique IDs across multiple servers without coordination. Essential for microservices and event-driven architectures.
Frequently Asked Questions
What is a UUID and why do I need one?
A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. UUIDs are essential for database primary keys, distributed systems, session tokens, API keys, and anywhere you need guaranteed unique identifiers without central coordination.
What is the difference between UUID v1 and UUID v4?
UUID v4 uses random or pseudo-random numbers, providing 122 bits of randomness with virtually zero collision probability. UUID v1 uses timestamp and MAC address, making them sequential and sortable but potentially revealing system information. Use v4 for most applications, v1 when you need time-ordered identifiers.
How many UUIDs can I generate at once?
Filator allows you to generate up to 10,000 UUIDs in a single batch, significantly more than competitors like UUIDTools.com (100 max) and GUIDGenerator.com (1,000 max). All generation happens instantly in your browser with no server limits.
Are the UUIDs generated cryptographically secure?
Yes. Filator uses the Web Crypto API (crypto.getRandomValues()) for UUID v4 generation, providing cryptographically strong random values. This is the same level of security used by banking applications and security systems.
What is a GUID and how is it different from UUID?
GUID (Globally Unique Identifier) is Microsoft's implementation of UUID. They are functionally identical 128-bit identifiers. GUIDs are typically formatted in uppercase with curly braces like {3F2504E0-4F89-41D3-9A0C-0305E82C3301}, while UUIDs use lowercase without braces.
What are namespace UUIDs (v3 and v5)?
UUID v3 and v5 are deterministic - they always generate the same UUID for a given namespace and name combination. V3 uses MD5 hashing, v5 uses SHA-1 (more secure). Common namespaces include DNS, URL, OID, and X500. Use these when you need reproducible identifiers.
Can I use UUIDs as database primary keys?
Yes, UUIDs work excellently as database primary keys, especially in distributed systems where auto-incrementing integers are not feasible. They use 16 bytes of storage compared to 4-8 bytes for integers, but provide guaranteed uniqueness across multiple databases.
Is this UUID generator safe for sensitive applications?
Yes, completely safe. All UUID generation happens 100% client-side in your browser. Your data never leaves your device - there is no server upload, no tracking, and no data collection. Filator uses cryptographically secure random number generation for v4 UUIDs.
Ready to Generate UUIDs?
Start generating UUIDs instantly with complete privacy. No signup, no limits, no server processing - just fast, secure UUID generation that works entirely in your browser. Generate up to 10,000 UUIDs at once with support for all versions and custom formats.