UUID & Identifiers Tools
Identifier reference and tools: UUID v4 randomness versus v7 time ordering, ULID sorting advantages and random token entropy, how each behaves as a database.
UUID 与标识符指南 (UUID & Identifiers) is a frequently consulted reference for developers. Keeping the reference and ready-to-use tools on one page cuts the cost of switching back and forth. All tools below run locally, are free, and need no sign-up.
Related Tools
- 🆔UUID GeneratorGenerate cryptographically secure UUID v4 and GUID values locally in your browser. Create unique IDs for database keys, tokens and sessions in one click.
- 🆔ULID GeneratorGenerate sortable Universally Unique Lexicographic IDs (128-bit, timestamp-based). Time-ordered IDs that sort naturally in databases, logs and indexes.
- 🎲Token GeneratorGenerate random secure tokens with custom charset, length, and hex or base64 output. Flexible enough for API keys, sessions, nonces and one-time links.
- 🎭Fake Data GeneratorGenerate mock names, emails, phones, addresses and IDs in JSON or CSV for testing, prototyping and database seeding. Set field combinations and row counts.