UUID Generator
Free UUID generator for v4 UUIDs. Create 1 to 100 cryptographically random UUIDs instantly, then copy them or download a text file for IDs, keys and test data.
About the UUID Generator
A UUID generator that produces cryptographically random version 4 UUIDs instantly in your browser. Choose how many you need (1 to 100), generate them, and copy or download them for your project.
A UUID (universally unique identifier) is a 128-bit value written as 36 characters — 8-4-4-4-12 hex digits, like 550e8400-e29b-41d4-a716-446655440000 — designed so that anyone can generate identifiers anywhere, with no central registry, and never collide. They're the default primary key in distributed systems, the correlation ID in logs, the idempotency key in payment APIs, the device or session identifier in analytics — anywhere two systems must mint IDs independently and merge them later without conflict.
This generator produces version 4 UUIDs, the purely random variant, using the browser's cryptographically secure crypto.randomUUID(). The randomness is what delivers the guarantee: a v4 UUID carries 122 random bits, so the chance of two ever colliding is so small that you'd need to generate a billion UUIDs per second for decades to reach even a remote probability of one duplicate. In practice: generate freely, don't check.
Ask for one or up to a hundred at a time — one per line, ready to copy into code, a database seed script, a spreadsheet of test data, or to download as a text file. Generation is local to your browser; nothing is logged, so the IDs you take from here exist nowhere else. If you need deterministic, name-based identifiers (the same input always yielding the same UUID), that's version 5 territory — different tool, different trade-offs; for the everyday "give me an ID nobody else has", v4 is the answer.
How to use the UUID Generator
- Enter the number of UUIDs you want to generate (between 1 and 100).
- Click 'Generate UUIDs' to create them instantly.
- Copy the generated UUIDs individually, or copy the entire list.
- Alternatively, download the UUIDs as a text file.
Worked example
Enter 5 in the count field to generate five unique IDs like 550e8400-e29b-41d4-a716-446655440000.
Frequently asked questions
- What's the difference between UUID versions?
- v4 is random (this tool), v1 embeds a timestamp and MAC address, v5 hashes a name into a deterministic UUID, and v7 combines a timestamp with randomness for sortable IDs. v4 is the safe general-purpose default.
- Can two v4 UUIDs collide?
- Theoretically yes, practically never — 122 bits of randomness makes a duplicate so unlikely that no real system guards against it. Generate without checking.
- Are these UUIDs secure to use as secrets?
- They're generated with a cryptographically secure RNG, but UUIDs are identifiers, not credentials — they often leak into logs and URLs. Use a dedicated secret/token generator for authentication material.
- Why should I use UUIDs instead of auto-incrementing integers?
- UUIDs allow distributed systems to generate identifiers without needing a central database to assign the next ID. They also hide your data volume (unlike user ID #152).
- Is it safe to generate UUIDs here for production?
- Yes. The generation happens entirely in your browser using the Web Crypto API, meaning the UUIDs are never sent to a server and are completely private.
More from Avexora
All Avexora products →Business software from the team behind these free tools.
- CRM
Avexora AI CRM
A CRM and project workspace for growing businesses.
Visit Avexora AI CRM - WhatsApp Business API
AvexWA
WhatsApp Business API platform for broadcasts, chatbots and automation.
Visit AvexWA - AI business ecosystem
Avexora AI EBOS
From a blank page to a live funnel in minutes.
Visit Avexora AI EBOS - Enterprise AI
Avexora AI
Enterprise-grade AI systems for operations and growth.
Visit Avexora AI - AI voice calling
Avexora AI Voice Agents
Your business phone, answered by AI in every language, every hour.
Visit Avexora AI Voice Agents - OMR exam software
Avexora ExamOS
AI-powered OMR scanning and exam management for schools.
Visit Avexora ExamOS
Related tools
Free strong password generator. Create random 4–128 character passwords with uppercase, lowercase, numbers and symbols — generated locally, never sent.
Hash GeneratorFree SHA hash generator. Compute SHA-1, SHA-256 and SHA-512 hex digests of any text instantly in your browser — nothing is ever uploaded.
Base64 Encoder / DecoderFree base64 encoder and decoder. Convert any text to base64 or decode base64 back to text, with full Unicode support — runs entirely in your browser.
Timestamp ConverterFree unix timestamp converter. Convert epoch seconds or milliseconds to readable UTC and IST dates — or paste an ISO date to get its unix timestamp.