ULID Generator
NewGenerate Universally Unique Lexicographically Sortable Identifiers (ULIDs).
Decoded timestamp
Generate a ULID to inspect its 48-bit timestamp.
Total generated
0
Length
26 chars
ULID = 48-bit timestamp (ms since epoch) + 80-bit random data encoded with Crockford Base32.
Timestamp breakdown
Frequently Asked Questions
Is the ULID Generator secure?
Yes. All cryptographic operations use the browser's built-in Web Crypto API, a FIPS-approved implementation. Everything runs client-side — no keys, passwords, or tokens are ever sent to a server.
How does id work in this tool?
This tool leverages the browser's native Web Crypto API to perform id operations. The algorithm executes entirely inside your browser's JavaScript engine so your sensitive data is never exposed to any external service.
What is the difference between ulid and encryption?
Ulid typically produces a fixed-length output that cannot be reversed, making it ideal for verification and integrity checks. Encryption is a two-way process that allows the original data to be recovered with the correct key.
Can I use ULID Generator offline?
Yes. When you install Web Developer Toolbox as a Progressive Web App (PWA), the ULID Generator works fully offline — the service worker caches all assets so no internet connection is required.
How long should my ulid be?
Current industry best practices recommend at least 128 bits (16 bytes) for tokens and at least 256 bits for cryptographic secrets. Longer values provide significantly stronger security guarantees against brute-force attacks.