How to Use
- 1.
Choose how many UUIDs you want to generate.
- 2.
Select lowercase or uppercase output.
- 3.
Choose whether to keep standard hyphens or remove them for compact output.
- 4.
Click Generate UUIDs to create a fresh list.
- 5.
Copy one UUID, copy all generated UUIDs, or download the list as a TXT file.
- 6.
Use the values in databases, APIs, fixtures, mock data, or development workflows.
Features
Generate UUID v4 values
Create 1 to 100 UUIDs at once
Lowercase and uppercase output
Hyphenated or compact no-hyphen format
Copy single UUID or copy all UUIDs
Download generated UUIDs as a TXT file
Browser-based random generation
Useful for APIs, databases, logs, testing, and mock data
Frequently Asked Questions
What is a UUID?+
A UUID is a Universally Unique Identifier, usually shown as a 128-bit value in hexadecimal format. It is used to identify records, objects, requests, files, and other entities.
What is UUID v4?+
UUID v4 is a randomly generated UUID format. It is widely used because it can be generated independently without a central counter.
Can I generate multiple UUIDs at once?+
Yes. Choose a count such as 5, 10, 25, 50, or 100, then generate and copy or download the full list.
Should UUIDs be uppercase or lowercase?+
Most systems accept lowercase UUIDs, which is the common default. Uppercase is available for systems, documents, or legacy workflows that expect it.
Can I remove hyphens from UUIDs?+
Yes. Turn off hyphens to create a compact 32-character UUID string.
Are UUIDs safe for passwords or API secrets?+
No. UUIDs are identifiers, not security secrets. Use a dedicated cryptographic token generator for passwords, API keys, and reset tokens.
Are generated UUIDs uploaded to a server?+
No. UUID generation, formatting, copying, and downloading happen locally in your browser.
About this tool
Free UUID Generator
Use this free UUID Generator Online to create random UUID v4 values for databases, APIs, test data, application records, form submissions, logs, local development, and distributed systems. Generate a single UUID or create multiple identifiers at once, then copy individual values, copy the full list, or download the results as a plain text file. A UUID, or Universally Unique Identifier, is a 128-bit identifier commonly written as five groups of hexadecimal characters separated by hyphens. UUID v4 values are randomly generated, which makes them useful when different systems need identifiers without asking a central database for the next number. They are often used for primary keys, public IDs, request IDs, file names, session-like references, import records, fixtures, mock API responses, and software testing. This tool gives practical formatting controls. Keep the standard hyphenated lowercase format for most APIs and databases. Switch to uppercase when a legacy system or document style requires it. Remove hyphens when a platform expects a compact 32-character identifier. You can generate 1, 5, 10, 25, 50, or 100 UUIDs in one click, which is useful for test data, spreadsheets, seeding scripts, or bulk placeholder records. UUIDs are designed to be unique, not secret. Do not use a UUID by itself as a password, API token, reset link secret, or security credential. For authentication secrets, use a dedicated cryptographic token generator and proper expiration rules. This UUID Generator runs locally in your browser, and the generated identifiers are not uploaded to WebToolsEdge.
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