Free · No signup · Runs in your browser
UUIDGenerator
Generate a ready-to-paste CSV column of random v4 UUIDs — entirely in your browser, with nothing sent to a server.
Generate a ready-to-paste CSV column of random v4 UUIDs — entirely in your browser, with nothing sent to a server.
Pick a column name, how many UUIDs you need, and a format. The generator builds an RFC-4122 v4 UUID per row and returns a clean CSV you can download or copy.
Type the header you want (defaults to id) and how many UUIDs to produce. Counts are capped at 10,000 rows to keep generation instant.
Standard v4 is lowercase with dashes. Switch to uppercase for systems that expect it, or no-dashes for a compact 32-character hex string.
Each row is a fresh, unique v4 UUID. Copy the CSV or download it — generation happens locally using your browser's crypto API.
A focused tool for producing identifier columns without spreadsheets, scripts, or a network round-trip.
Uses crypto.randomUUID() when your browser supports it, falling back to crypto.getRandomValues for genuinely random version-4 identifiers.
No data leaves your machine. The generator runs as static JavaScript, so the UUIDs you create are never transmitted or logged.
Output is valid RFC-4180 CSV with a header row, so it pastes cleanly into spreadsheets, databases, and seed scripts.
Match whatever your target system expects: lowercase dashed, uppercase, or dashless 32-character hex.