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  1. UUID
    1. V1
    2. V4
    3. V5
  2. ULID
  3. Blog
  1. UUID
    1. V1
    2. V4
    3. V5
  2. ULID
  3. Blog

About uuid-generator.tools

What is uuid-generator.tools?

uuid-generator.tools is a free, simple, and developer-friendly online utility designed to instantly generate universally unique identifiers (UUIDs). Whether you need a single UUID for a quick test or many UUIDs for database entries, API keys, or other uses — our tool lets you get them with a single click, no installation, signup, or configuration needed.

What is a UUID?

A UUID (Universally Unique Identifier) — sometimes called a GUID (Globally Unique Identifier) — is a 128-bit value used to uniquely identify objects, resources, or entities in software systems. UUIDs are represented as 36-character strings in the familiar hyphenated format (e.g. xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx) and are widely used by developers for database keys, session IDs, request tokens, file identifiers, and more.

UUID version 4 (UUIDv4) — the most common variant — generates identifiers randomly, based on cryptographically secure randomness. This ensures a negligible probability of collisions even when generating many IDs across distributed systems.

Why Use Our Tool?

  • Instant & convenient. No sign-ups, no logins, no server-side delays — you get your UUIDs immediately in the browser.
  • Privacy first. All UUID generation happens locally in your browser; nothing is sent to a server or stored externally.
  • Standards-compliant. Generated UUIDs follow the established UUID format (RFC / standard).
  • Flexible & usable in many contexts. Suitable for databases, APIs, file identifiers, testing data, and more.

Common Use Cases

  • Assigning unique identifiers to resources in databases.
  • Generating session or request IDs for web applications or APIs.
  • Creating unique filenames or asset identifiers.
  • Generating test or dummy data during development and QA.
  • Ensuring globally unique IDs across distributed systems.

How It Works

  1. Open the UUID-Generator.Tools page in your browser.
  2. Click “Generate UUID”.
  3. Receive a newly generated UUID — ready to copy and use immediately.
  4. Use the generated UUID in your code, database, or system as needed.

Our Philosophy

We believe that developers and system architects deserve tools that are:

  • Fast and hassle-free — no friction, no overhead;
  • Free and accessible — available to everyone;
  • Secure and private — all generation happens locally;
  • Reliable and standards-aware — producing robust, compliant UUIDs.

We created this site to provide a minimalist, dependable utility you can rely on in everyday development tasks — whether you're building a small side project, a distributed system, or just need a quick UUID.