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Random v4 IDs are the default for database primary keys in many stacks, test fixtures, correlation IDs in logs, and client-generated record keys before sync. They are not ordered in time — if you need sortable IDs, look at ULID or UUID v7 elsewhere.
Each line is an independent v4 string in standard hyphenated form. The cap of 100 per run keeps the tab responsive. For millions of IDs, use a script in your environment rather than a web form.
Version 4 only — not v1 MAC-based, not v7 time-ordered, no brace-wrapped Windows-only format toggle. Uniqueness is probabilistic, not a guarantee enforced by a central registry.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.
Generate strong, secure, and random passwords locally in your browser.
MD5 for checksums plus SHA-1, SHA-256, and SHA-512 via Web Crypto — all in your browser, nothing uploaded.
Format, validate, prettify and beautify your JSON data instantly.
Decode JSON Web Tokens (JWT) safely to view header and payload without sending secrets to any server.
Convert Unix epoch timestamps to human-readable dates, and vice versa.
Format, beautify, and strictly align your messy SQL queries securely.
