How it works
UUID Generator — Generate cryptographically random UUID v4 in bulk. All processing happens in your browser — no upload, no signup, no email required. Free forever.
Frequently asked questions
Are these UUIDs cryptographically random?
Yes. We use the browser's crypto.randomUUID() (or crypto.getRandomValues fallback), the same primitives used for security tokens.
What version are the UUIDs?
UUID v4 — fully random, 122 bits of entropy. The collision probability is negligible even at billions per second.
Can I get UUIDs without hyphens or in uppercase?
Yes. Toggle 'Include hyphens' off to get a 32-character hex string, or 'Uppercase' on for ABC… formatting. Both apply to all generated values at once.
Related tools
- URL Encoder/DecoderPercent-encode and decode URI components and full URLs
- JWT DecoderDecode and inspect JSON Web Tokens (header, payload, expiry)
- Regex TesterTest regular expressions with live match highlighting
- Cron Expression BuilderBuild and explain cron expressions in plain language
- SQL FormatterBeautify, minify or format SQL queries for any major dialect
- YAML ↔ JSON ConverterConvert between YAML and JSON in either direction