UUID & GUID Generator – Create v1, v4, v7, GUID IDs Instantly
What Is This UUID & GUID Generator?
This online UUID & GUID Generator is a secure, browser-based tool that instantly creates unique identifiers for development, databases, APIs, testing, distributed systems, and software workflows. The tool supports multiple formats including UUID v1, UUID v4, UUID v7, GUID, ULID, NanoID, KSUID, CUID, and CUID2. All generation happens locally on your device, ensuring complete privacy with no server interaction.
How the Generator Works
The tool is simple to use: select the type of ID you want to generate, enter the quantity, and click Generate IDs. The system creates the identifiers instantly using secure client-side algorithms. The generated IDs appear in the output box where you can view, copy, or download them in multiple file formats.
Because the tool runs entirely in your browser, the IDs are created with zero latency and zero data tracking. All calculations use cryptographically secure random number generation (CSPRNG), standardized algorithms, or timestamp-based ordering depending on the selected ID type.
Key Features
- Multiple ID Types: Generate UUID v1, v4, v7, GUID, ULID, NanoID, KSUID, CUID, and CUID2.
- Local Generation: Everything runs in the browser — no server, no data sharing, no tracking.
- Up to 1000 IDs at Once: Bulk generation for database seeding, testing, or development.
- Instant Output: IDs appear immediately with low CPU overhead.
- Copy & Export: Export generated IDs to CSV, Excel, JSON, SQL, or XML.
- Editable Output Box: Modify or clean IDs before saving.
- Lightweight Tool: Instant load and optimized for all browsers.
- Developer Friendly: Great for APIs, logs, containers, and distributed systems.
- Non-Technical Friendly: Simple interface with no coding required.
Why Are These IDs Unique?
UUIDs, GUIDs, and modern identifiers like ULID or NanoID use extremely large entropy spaces (typically 128-bit or higher), cryptographic randomness, timestamps, or ordered bit structures. This design makes collisions mathematically improbable — even if billions of IDs are generated across millions of devices.
In practical terms, the probability of two randomly generated UUID v4 IDs colliding is close to zero — so low that the universe would end long before you see a duplicate.
Why Is the ID Generation Limited?
The ID generation is capped at 1000 IDs per batch to protect your browser from accidental overload, ensure fast performance, and maintain smooth user experience. Since the tool runs locally, generating too many IDs at once could freeze older browsers or low-memory devices.
The limit also ensures strong randomness quality, stable entropy, and predictable performance across all platforms.
Types of IDs Supported
1. UUID v1 (Timestamp-Based)
Combines timestamp + clock sequence + node information. Suitable where sequential ordering matters. Not ideal for privacy-sensitive systems due to embedded timestamp components.
2. UUID v4 (Random-Based)
The most widely used format. Fully random 128-bit data, extremely low collision risk, simple and universal. Used in APIs, databases, cloud systems, and modern applications.
3. UUID v7 (Time-Ordered)
Newer, more efficient format combining timestamp + randomness. Sortable and ideal for logs, distributed systems, and high-performance databases.
4. GUID (Microsoft UUID Variant)
Functionally similar to UUID v4 but used primarily in Windows systems, .NET applications, and Microsoft frameworks.
5. ULID (Universally Unique Lexicographically Sortable Identifier)
Produces shorter, sortable IDs combining timestamp + randomness. Human-friendly and ideal for databases.
6. NanoID
A compact, URL-safe, high-entropy ID format. Extremely fast and widely used for frontend, backend, and serverless applications.
7. KSUID
Sortable like ULID but with 160-bit entropy. Designed for distributed systems, logs, and high-volume event storage.
8. CUID
Collision-resistant IDs optimized for distributed systems. Often used where UUIDs are too large.
9. CUID2
Modern version of CUID with improved entropy, URL-safe characters, and optimized collision resistance.
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Frequently Asked Questions (FAQs)
1. What is a UUID?
A UUID is a 128-bit universally unique identifier used to identify data, records, or resources.
2. What is the difference between UUID and GUID?
GUID is Microsoft’s implementation of UUID. Functionally almost identical.
3. Are UUIDs unique forever?
Yes, statistically. The possibility of collision is so small it is considered impossible in real-world usage.
4. Are IDs generated here safe?
Yes. Everything is generated locally in your browser using secure algorithms. No data is uploaded or stored.
5. What is UUID v4 used for?
Random unique identifiers used in cloud services, APIs, databases, and authentication systems.
6. What is UUID v7?
A sortable, timestamp-based UUID ideal for logging and distributed systems.
7. Why use ULID?
ULID provides sortable IDs with readable characters and high randomness.
8. What is NanoID?
A compact, modern alternative to UUID with high entropy and fast generation.
9. What are KSUIDs?
Timestamp-sorted IDs ideal for distributed event systems and analytics.
10. What is CUID?
A collision-resistant ID designed to work reliably across distributed environments.
11. Do I need an internet connection?
No. The tool works even offline once loaded.
12. Is there any rate limit?
Yes, 1000 IDs per batch to prevent browser performance issues.
13. Can I export generated IDs?
Yes — CSV, Excel, JSON, SQL, and XML formats are supported.
14. Can I copy all IDs at once?
Yes, use the “Copy” button to copy the complete list.
15. Are these IDs case-sensitive?
Yes, some formats (like NanoID, CUID2) are case-sensitive by design.
16. Can I edit IDs manually?
Yes, the output box is fully editable.
17. Is this tool free?
Yes, 100% free with no signup.
18. Does the tool store generated IDs?
No. Nothing is stored, logged, or transmitted.
19. Why are IDs so long?
Longer IDs contain more entropy, making collisions nearly impossible.
20. Are these IDs safe for production use?
Yes. They follow industry standards and are safe for production systems.