Our free Guid Generator lets you instantly create up to 2,000 secure, customizable Global Unique Identifiers with just one click, ensuring your database keys and software identifiers are perfectly formatted every time.
Options:
What is a GUID anyway?
GUID stands for Globally Unique Identifier. It is a 128-bit integer number used to identify resources. The term is generally used by developers working with Microsoft technologies (like C# or SQL Server), while the rest of the tech world often calls them UUIDs (Universally Unique Identifiers).
About This Guid Generator Tool
We built this Guid Generator specifically for developers, QAs, and database administrators who need a quick, no-nonsense way to generate unique keys. Whether you are mocking up data for a new application, assigning primary keys in a SQL database, or testing API endpoints, formatting matters. Unlike basic random string generators, this tool gives you granular control over the output. You can toggle strict formatting options like curly braces (often used in registry files or configuration settings) or Base64 encoding (if you need to save space in your database). Best of all, this tool runs locally in your browser—meaning the GUIDs you generate are private and never stored on our servers.
How To Use Guid Generator
Generating your IDs is incredibly simple. Just follow these steps:
- Set Quantity: In the input box labeled “How many GUIDs do you want?”, enter a number between 1 and 2000.
- Customize Options:
- Check Hyphens to include dashes (standard format).
- Check {} Braces to wrap the ID in curly brackets.
- Check UpperCase if your system requires capital letters (A-F).
- Check URL encode if you plan to use these IDs in query strings.
- Check Base64 encode for a compact, binary-to-text version.
- Generate: Click the dark blue Generate button.
- Copy: Click Copy to Clipboard to grab your list instantly, or hit Reset to start over.
Example Output
Depending on the options you check in the tool, here is how your GUIDs might look:
- Standard (Hyphens):
e0262106-95f3-424f-a931-270831682708 - With Braces & Uppercase:
{E0262106-95F3-424F-A931-270831682708} - Base64 Encoded (Shorter, URL friendly):
4CYhBpXzT0KpMScIMWgncA== - URL Encoded:
e0262106-95f3-424f-a931-270831682708(Useful when passing IDs in browser address bars)
Use Cases
- Database Primary Keys: Use these as unique identifiers for rows in databases (like MS SQL Server or MySQL) to prevent ID collisions when merging data.
- Session Tokens: Generate unique session IDs for users logging into a web application.
- Uploaded File Names: Rename user-uploaded files (like images) to a GUID to ensure no two files ever have the same name on your server.
- Software Testing: Quickly generate 2,000 IDs to stress-test your application’s ability to handle bulk data import.
- Registry Scripts: Create IDs for Windows registry keys which often require the
{Braces}format.
Frequently Asked Questions (FAQs)
Is there a difference between a UUID and a GUID?
Technically, no. They are effectively the same thing. GUID (Globally Unique Identifier) is the term Microsoft prefers, while UUID (Universally Unique Identifier) is the standard term used in Linux, Java, and the rest of the open-source world. They both follow the RFC 4122 standard.
Are these GUIDs truly unique?
While it is theoretically possible to generate the same GUID twice, the probability is so astronomically low that it is effectively zero. To put it in perspective: you are more likely to be hit by a meteorite than to generate a duplicate GUID v4.
Can I use these for passwords?
You can, but you shouldn’t. While they are random, GUIDs are not designed for cryptographic security (like passwords). They are designed for uniqueness. Use a dedicated Password Generator for credentials.
Does the “Base64 encode” option change the ID?
It doesn’t change the underlying “value” of the ID, but it changes how it is represented. It takes the binary data of the GUID and converts it into a shorter string of characters. This is great for making URLs shorter or saving database space.
Why do some GUIDs have curly braces {}?
This is a convention largely started by Microsoft. You will often see GUIDs wrapped in braces in the Windows Registry or in .config files for .NET applications. If you aren’t working in a Microsoft environment, you usually don’t need the braces.