UUID Generator (v4 and v7)

Generate one or thousands of UUIDs - v4 random or v7 time-ordered

🔒 100 % in-browser🆓 Gratuit pour toujours⚡ Pas de signup
Note : L'interface de l'outil ci-dessous n'est actuellement disponible qu'en anglais. On traduit les UI une par une. Voir cet outil en anglais →

v4 is fully random. v7 embeds a millisecond timestamp so IDs sort chronologically - ideal for database primary keys.

Comment ça marche

  1. 1
    Pick a version

    v4 is fully random. v7 embeds a timestamp so IDs sort chronologically - ideal for database keys.

  2. 2
    Set the count

    Generate 1 UUID or up to 1,000 at once for seeding databases or test data.

  3. 3
    Copy them

    Click Copy all to send the list to your clipboard, one per line.

À propos de UUID Generator (v4 and v7)

Free online UUID generator. Create RFC 4122 v4 (fully random) or v7 (time-ordered) UUIDs, one at a time or up to 1,000 in bulk. Uses the browser's cryptographic random source. Runs entirely in your browser. UUID Generator (v4 and v7) sur 712 Tools tourne entièrement dans ton browser via des APIs JavaScript natives - aucun server ne voit jamais tes données. Résultats instantanés, privacy complète, et aucune limite d'upload.

Que ce soit pour une session de debug, un sanity check rapide ou un incident en prod, cet outil est gratuit à utiliser autant que tu veux. Pas de watermarks, pas de signup et pas d'ads dans l'outil.

Questions fréquentes

What's the difference between v4 and v7?

v4 is 122 bits of randomness. v7 puts a 48-bit millisecond timestamp in the first bytes, so IDs are sortable by creation time - much better for database primary keys.

How random are these?

They use window.crypto.getRandomValues, the same source used for TLS keys. Not Math.random.

Are the UUIDs stored?

No. They're generated and displayed locally - nothing is sent to any server.

Lire plus

5 min de lecture

UUID v4 vs v7: which one should you use in 2026?

v4 is random. v7 is time-ordered. That one difference decides your database performance. Here's when each wins, and why v7 is quietly becoming the default.

Outils similaires

Lorem Ipsum

Generate placeholder text - paragraphs, sentences, or words

Cron Generator

Build and explain cron schedules visually

Password Generator

Generate strong, random passwords with a strength meter

QR Code Generator

Create custom QR codes with colors and downloadable PNG/SVG

Meta Tag Generator

Generate SEO, Open Graph, and Twitter Card meta tags with preview

HTTP Status Codes

Search and browse every HTTP status code with common causes