Introduction
The UUID Generator creates RFC-style UUID v4 identifiers for primary keys, correlation IDs, and public resource names without a central allocator. Random UUIDs make collisions extremely unlikely for practical workloads; still enforce uniqueness in your database when required. UUIDs are identifiers, not secrets—always authorize access in your APIs. For validating strings, use the UUID Validator. For human secrets, use the Password Generator instead. Copy generated values into migrations, APIs, or tests as plain strings in the format your stack expects.
Explore more in Tools, All Tools, or the Security Tools category.
How to use
- Choose how many UUIDs you need (if the UI supports batch).
- Generate UUID v4 values using the tool action.
- Copy a UUID into your migration, SQL insert, or API payload.
- Store UUIDs as strings in the format your database expects.
- Validate UUIDs at system boundaries with the UUID Validator when needed.
Use cases
- Seed local databases with realistic-looking IDs
- Create request IDs for tracing logs across services
- Generate IDs for fixtures in automated tests
- Draft client-side IDs before server confirmation
- Replace incremental IDs when exposing resources publicly
FAQ
- Are UUID v4 values guaranteed unique?
- Collision probability is extremely low for practical purposes, but always enforce uniqueness in your DB if required.
- UUID vs ULID?
- ULIDs are sortable by time; UUID v4 is random. Choose based on indexing and UX needs.
- Should I expose UUIDs in URLs?
- Often yes, but always authorize access—IDs are not secrets.
- Can I validate UUIDs?
- Yes—use the UUID Validator tool on DevToolDock.
- Is this tool free?
- Yes. DevToolDock provides UUID generation as a free online utility.