Creating correlation IDs for log tracing
When debugging multi - step requests, correlation IDs help you connect events across services. Generating a UUID for each request makes tracing and reporting more consistent.
UUID Generator
Generate random UUIDs (v4) and GUIDs instantly. Create unique identifiers for databases, APIs, and applications.
When you need unique identifiers for database rows, API requests, test data, or client - side keys, generating UUIDs manually is not practical and can cause collisions.
How to use
Generate one or more UUIDs and copy them directly into your database records, requests, or test fixtures.
- Click 'Generate' to create a new UUID
- Choose the number of UUIDs to generate (1 - 100)
- Select format (uppercase, lowercase, with/without hyphens)
- Copy the generated UUIDs
Why this tool is useful
UUIDs are widely used as identifiers for database records, requests, and test fixtures. Generating them manually is risky because format errors and accidental duplicates can occur. When you need multiple IDs quickly, a generator keeps your workflow moving without switching contexts.
A reliable UUID format also helps systems validate inputs and reduces time spent debugging “invalid ID” errors.
What this tool helps with
Standard - format UUIDs reduce format - related failures in APIs and databases. Batch generation is useful for tests where each row or object needs a unique key.
Using unique request IDs also improves troubleshooting: correlating logs becomes easier when each operation has a stable identifier.
Examples
Filling unique keys in sample datasets
Sample data often needs unique identifiers to avoid collisions. Batch - generating UUIDs helps you create realistic fixtures without manual copying mistakes.
Recommended for
Recommended if you: - need valid UUIDs for APIs, databases, or configs - generate test data that requires unique keys - add correlation IDs to improve troubleshooting - want a quick, repeatable way to create identifiers
Privacy and processing
UUIDs are generated entirely in your browser. No data is sent to our servers.
Frequently Asked Questions
What is a UUID?
UUID (Universally Unique Identifier) is a 128 - bit identifier that is practically unique across space and time. It's used to identify records in databases, API requests, and more.
What's the difference between UUID and GUID?
They're essentially the same thing. UUID is the standard term, while GUID (Globally Unique Identifier) is Microsoft's terminology. Both refer to the same 128 - bit format.
How unique are these UUIDs?
UUIDs are cryptographically random. The probability of generating the same UUID twice is astronomically low (1 in 2^122), making collisions virtually impossible.
What UUID version does this generate?
We generate UUID version 4 (random), which is the most commonly used version. All bytes except version and variant bits are random.
Can I generate multiple UUIDs at once?
Yes, you can generate up to 100 UUIDs at a time with a single click. Perfect for bulk operations.
Is my data private?
Yes. UUIDs are generated entirely in your browser using cryptographically secure random numbers. Nothing is sent to our servers.
Can I customize the format?
Yes, you can choose uppercase or lowercase letters, and include or exclude hyphens based on your needs.
Are these UUIDs secure for tokens?
Yes, we use cryptographically secure random number generation (crypto.getRandomValues). However, for authentication tokens, consider using dedicated token libraries.
Related Tools
Generate strong random passwords instantly. Customize length, characters, and complexity.
Decode JWT header and payload instantly. No verification, no server upload. Works in your browser.
Encode or decode URLs and query strings instantly. Handle special characters safely in URLs.