UUID Generator

How it works

What it does

The UUID Generator creates Universally Unique Identifiers suitable for test fixtures, correlation IDs, and application keys. Output is plain text you can copy into factories, migrations, or API docs.

When to use it

• Seeding demo data with stable-looking IDs
• Creating example resource IDs for OpenAPI samples
• Quickly grabbing a few IDs while writing tests

How input is processed safely

Generation uses safe random/UUID libraries on the server side for the request only. It does not scan your databases and does not register the IDs globally as reserved. Count limits prevent abusive bulk generation.

Examples

• Generate 1–20 UUIDs for a PHPUnit data provider
• Copy a single UUID into a bug report correlation field

Common mistakes

• Assuming UUIDs are secret auth tokens
• Using sequential IDs when you needed unpredictability—or the reverse
• Case sensitivity surprises when comparing string IDs

UUIDs are identifiers, not capabilities. Knowing a UUID should not grant access unless your authorization layer says so. For session secrets and API tokens, use dedicated secure random token generators with appropriate entropy and storage hashing where needed.

Choose versions intentionally in application code (v4 random is common). This tool focuses on generating usable IDs for development speed; your domain model should document which UUID version you persist.

Bulk-generate only what you need for a fixture file. Enormous lists do not make tests better if a handful of stable IDs would do.

Practical tips

• Keep inputs small and representative; huge pastes slow feedback and raise risk of accidental secret disclosure.
• After using UUID Generator, verify the result in your own environment (correct SAPI, correct host, correct project root).
• Cross-link findings to ZendStudio.net PHP error guides and IDE setup pages when the next step is configuration rather than code edits.
• Prefer repeatable project tooling (CI, Composer scripts, IDE inspections) for repo-wide enforcement; this page is for interactive problem-solving.

Privacy note

UUIDs you generate here are not tied to your users. Do not paste lists of real production IDs if they can be correlated with personal data in the same document.

Safety notes

• Submitted tool contents are not written to analytics or search logs.
• This site never evaluates arbitrary PHP from the browser.
• Generated configs are starting points—validate on a staging host before production.