📖 Description

UUID (Universally Unique Identifier): A Universally Unique Identifier.
GUID (Globally Unique Identifier): Globally Unique Identifier (Microsoft's term for the UUID standard).
Core Advantage: The design goal of UUID is to allow all elements in a distributed system to have unique identification information without the need for a central controller to assign them. Ideally, even if the total number of UUIDs generated worldwide reaches astronomical figures, the probability of a collision (duplication) is extremely low.

This site provides flexible configuration options to adapt to the specifications of different programming languages and systems:

Supports generating 1 to 1000 UUIDs at once, meeting the needs for batch importing test data or initializing databases.

Standard Hyphenated Format: e.g., 550e8400-e29b-41d4-a716-446655440000.
Pure Hexadecimal Format: Removes hyphens, convenient for storage fields with strict format requirements (e.g., 550e8400e29b41d4a716446655440000).
Case Toggle: Supports generating all uppercase or all lowercase formats, adapting to different development conventions like C# (GUID) or Java/Python.

UUID v4 (Random Generation): Currently the most recommended and widely used version. It is generated entirely based on random (or pseudo-random) numbers, offers high security, does not contain hardware information of the generating machine (such as MAC address), and effectively protects privacy.

Local Generation Technology: All UUID generation logic is completed locally in your browser.
Zero Server Interaction: The generated identifiers are never uploaded to the server, and the server does not retain any records, ensuring the IDs you use in production are absolutely private.

Scenario	Recommended Format	Advantage
Database Primary Key	Pure Hexadecimal (No Hyphens)	Reduces storage space, improves indexing performance.
API Tracking (TraceID)	Standard Hyphenated Format	Improves log readability, facilitates quick debugging.
Software License Key	Uppercase + Hyphens	Matches the visual style of traditional commercial software registration codes.
Distributed File Naming	Lowercase (No Hyphens)	Avoids file system compatibility issues caused by special characters in filenames.

Set Quantity: Enter the number you need in the "Generate Quantity" box.
Configure Format: Check whether you need "Include Hyphens (-)" and select "Uppercase" or "Lowercase".
Click Generate: Results are immediately displayed in the text box below.
One-Click Copy: Results support "Copy All", and partial export via manual selection is also possible.

High Entropy Randomness: Uses a cryptographically secure pseudo-random number generator (CSPRNG), ensuring generated IDs have extremely high collision resistance.
Ready to Use: A pure web tool, no need to install any development packages (like uuid-ossp or guid-lib).
Lightweight & Fast: Optimized for developers, clean interface, no unnecessary distractions.
Completely Free: Unlimited generation, supports synchronized use on mobile and desktop.

GUID/UUID Generation