A universally unique identifier, or UUID, is a 128-bit alphanumeric value that uniquely distinguishes digital resources without coordination. Four standardized versions exist: time-based (v1), namespace-based with MD5 (v3), random (v4), and namespace-based with SHA-1 (v5). Each version encodes uniqueness through different inputs, ensuring collision resistance across distributed systems and databases.
You generate a UUID to tag records, trace transactions, or name files without risking duplication. This tool lets you create any version instantly, adjust casing, toggle dashes, and wrap braces, so the output matches coding conventions or API requirements. Deterministic namespace variants additionally link identifiers to semantic names for repeatable mappings.
By copying the preformatted value directly into configuration files, databases, or code modules, you prevent manual typing errors and speed deployment. Developers working offline benefit because no external service call occurs. Continuous testing pipelines also gain predictable identifiers, enabling snapshot restoration and fixture generation without external dependencies. Compliance audits likewise trace object lifecycles with minimal overhead.
Technical Details:
Understand key capabilities before using the generator.
- Supports RFC-4122 versions 1, 3, 4, and 5.
- Deterministic namespaces: DNS, URL, OID, X.500, or custom UUID.
- One-click generate button immediately supplies a new identifier.
- Copy output to clipboard with a single action.
- Toggle uppercase, dash removal, and brace wrapping for formatting.
- Client-side generation; no internet connection required.
- Generates a fresh UUID automatically when page loads.
Step-by-Step Guide:
Follow these steps to create and copy a UUID.
- Select the required UUID version from the dropdown.
- For v3 or v5, enter the name string.
- Provide a recognised namespace or existing UUID when prompted.
- Check formatting options to uppercase, strip dashes, or add braces Tip.
- Click Generate to create the identifier.
- Press Copy to place the result in your clipboard.
FAQ:
Find concise answers to common questions.
Which version should I choose?
Choose v1 for timestamp traces, v4 for randomness, and v3 or v5 for deterministic namespace-based identifiers.
Is the generation truly offline?
Yes. All calculations run entirely in your browser, so no data leaves your device.
Why might I remove dashes?
Some databases or URL schemes prefer contiguous characters; dash removal ensures compatibility.
Do braces matter?
Many programming languages accept brace-wrapped UUIDs for clearer token boundaries within strings.
Can collisions still occur?
The probability is astronomically low; practical deployments treat UUID collisions as negligible.
Outcomes are purely random and hold no monetary value.