Complete UUID Generator Suite
Free online tools for generating, decoding, and converting every major UUID version natively in your browser.
Random UUID Generator (v4)
Generate highly secure, random version 4 UUIDs and GUIDs instantly in your browser.
Open Tool →Time-Based UUID Generator (v1)
Generate time-based UUIDs securely in bulk using the Gregorian epoch timestamp.
Open Tool →MD5 Name-Based UUID Generator (v3)
Generate repeatable, name-based version 3 UUIDs using MD5 hashing and namespaces.
Open Tool →SHA-1 Name-Based UUID Generator (v5)
Generate deterministic version 5 UUIDs locally using the secure SHA-1 Web Crypto API.
Open Tool →UUID v7 Generator
Generate time-ordered v7 UUIDs securely in your browser. Perfect for database primary keys.
Open Tool →UUID Decoder & Validator
Parse any UUID to verify its validity, extract its version, and uncover hidden timestamps (v1 & v7).
Open Tool →ULID Generator
Generate time-ordered, sortable ULID strings. A shorter, URL-safe alternative to UUIDv7.
Open Tool →UUID to Byte Array & Base64 Converter
Convert UUIDs to Byte Arrays, Base64, Hex, and URN instantly in your browser.
Open Tool →Short UUID Generator
Convert standard UUIDs into URL-safe Base62 strings instantly.
Open Tool →NanoID Generator
Generate fast, URL-safe custom NanoIDs in bulk. Customize alphabet and length.
Open Tool →CUID2 Generator
Generate URL-safe, highly secure, and collision-resistant CUID2 strings.
Open Tool →MongoDB ObjectID Generator
Visually parse and bulk-generate 24-character BSON ObjectIDs used in MongoDB.
Open Tool →Bulk UUID Generator
Instantly generate up to 1,000,000 UUIDs and download them as a CSV, JSON, or SQL file.
Open Tool →Snowflake ID Generator
Visually parse and generate 64-bit time-based Snowflake IDs used in distributed systems.
Open Tool →UUID Extractor
Instantly find and extract all UUIDs from raw text, server logs, or JSON payloads.
Open Tool →A Complete Suite of Identifier Tools
Software architecture requires different types of unique identifiers depending on the specific database structure or application logic. While a random string is sufficient for a session token, high-performance database indexing requires time-ordered sequencing, and distributed systems often require deterministic hashing. This hub provides a dedicated utility for every RFC-standardized UUID version.
Understanding the UUID Versions
- Time-Based (v1 & v7): Designed to generate identifiers that sort chronologically. Version 1 uses the Gregorian calendar epoch and MAC addresses, while Version 7 uses the modern Unix epoch, making v7 highly optimized for database primary keys.
- Deterministic (v3 & v5): Designed to produce the exact same identifier every time you input a specific text string (like an email or URL) and a namespace. Version 3 uses MD5 hashing, while Version 5 uses the more secure SHA-1 algorithm.
- Random (v4): The standard for session tokens and non-sequential IDs, relying entirely on cryptographic randomness with no identifiable timestamps or machine data.
Why Local Processing Matters
Generating core database identifiers or hashing internal project namespaces via a third-party server API introduces network latency and massive security vulnerabilities. Every tool in this suite is built to execute locally using your browser's native JavaScript and Web Crypto API. This ensures maximum generation speed for bulk operations and guarantees that your sensitive internal data never leaves your machine.
Frequently Asked Questions
Which UUID version should I use for my database?
For modern SQL and NoSQL databases, UUID Version 7 is the recommended standard. Because it is time-ordered, it prevents the severe database index fragmentation caused by randomly generated Version 4 identifiers.
What is the difference between UUID and ULID?
ULIDs serve the exact same time-ordered purpose as UUID v7, but they are encoded in Base32. This makes them shorter (26 characters instead of 36) and URL-safe, but they are not officially part of the IETF RFC 4122 standard.
Can I decode a UUID to see when it was made?
Yes, if it is a time-based identifier (Version 1 or Version 7). You can use our UUID Decoder tool to extract the exact millisecond timestamp. Random (v4) and hashed (v3/v5) identifiers do not contain timestamps.