UUID Generator
Generate universally unique identifiers (UUIDs). Choose between the random v4 standard or the new, time-based, and sortable v7 standard.
A Universally Unique Identifier (UUID) is a 128-bit number used to identify information in computer systems. When generated according to the standard methods, UUIDs are, for all practical purposes, unique. Their uniqueness does not depend on a central registration authority or coordination between the parties generating them, unlike most other numbering schemes.
UUIDs are a fundamental building block in modern software development, commonly used as primary keys in databases, transaction IDs, and unique identifiers for almost any resource.
Version 4 (Random)
UUIDv4 is the most common version. It is generated using 122 bits of purely random or pseudo-random numbers. Because they are random, they have no inherent order and are excellent for ensuring uniqueness without leaking any information about the time or location of their creation.
- Pros: Extremely high collision resistance, simple to generate, reveals no information.
- Cons: Not sortable by creation time, which can lead to database index fragmentation and slower write performance in some database systems (like PostgreSQL).
Version 7 (Time-based)
UUIDv7 is a new standard (published in 2024) designed to address the shortcomings of v4 for database primary keys. The first 48 bits are a Unix timestamp (milliseconds since 1970), followed by 74 bits of random data. This makes them time-ordered and k-sortable.
- Pros: K-sortable by time, which is highly efficient for database indexing (prevents fragmentation). Includes a timestamp component for free. Still has very high collision resistance due to the random bits.
- Cons: Leaks the creation time of the record, which might be a security concern in some specific applications. It is a very new standard and may not be supported by all libraries out of the box.
Which one should I use?
For general-purpose unique IDs where sorting is not a concern, v4 is a safe, standard choice. For new projects using UUIDs as database primary keys, v7 is increasingly recommended for its performance benefits.
Tool guide
How to Use the UUID Generator
This guide explains what the tool does, where it fits into a real workflow, and how to use it confidently. It gives first-time visitors a clear written explanation of the page before they start working with their own text, files, or data.
What does this tool do?
The UUID Generator helps you generate version 4 or version 7 uuids. It is designed for quick, focused work: paste or choose your input, adjust the available options, and copy or download the result when you are done. The page is useful for writers, developers, students, analysts, marketers, and anyone who needs a small conversion job finished without installing another app.
Most tools on Text-Converters.com run directly in your browser, which keeps the experience fast and private. When a tool requires special processing, the page is built to keep the workflow clear so you know what is happening before you use it.
How to use this tool
- Open the UUID Generator page and read the options available near the input area.
- Paste text, upload a file, or enter the values that match the task you want to complete.
- Choose any formatting, conversion, privacy, or output options shown by the tool.
- Run the conversion and review the result before copying, downloading, or sharing it.
- Clear the input when you are finished, especially if you worked with private content.
When would you use this?
- A developer debugging a payload, token, checksum, color value, regular expression, or code snippet.
- A technical writer preparing examples that need consistent, readable formatting.
- A student or researcher who needs a quick uuid generator without installing desktop software.
- A remote worker who wants to clean up copied content before pasting it into a document, spreadsheet, CMS, or chat message.
Frequently asked questions
Is the UUID Generator free?
Yes. The tool is free to use, with no account, subscription, or payment required.
Do I need to install anything?
No. It works in your browser, so you can use it from a laptop, tablet, or phone.
Is my data stored?
The site is designed around privacy-first browser processing wherever possible. We do not ask you to create an account to use the tool.
Can I use the result commercially?
Yes, but always review the output before relying on it for important, legal, financial, medical, or production work.