Generate a UUID without leaving the browser. UUID Generator generates cryptographically strong UUID v4 and timestamp-based v1 identifiers in bulk — useful when you need to mint v4 or v1 identifiers, one at a time or thousands in bulk between two other steps of a debugging session. Everything runs inside your browser, so the file never touches a server, which matters when the payload contains tokens, customer records or anything else you would not paste into an unknown server.
How to
Four steps, no account, nothing to install.
v4 for general use, v1 when you want time ordering.
Generate one identifier or a whole batch.
Take the list as text or CSV.
Overview
A UUID is 128 bits printed as 32 hex characters in five dash-separated groups. Version 4 is random, version 1 embeds a timestamp and node id. Because generation needs no central coordination, distributed systems can mint identifiers offline and still stay unique in practice.
Pick a version — v4 for general use, v1 when you want time ordering. Set the count — Generate one identifier or a whole batch. Copy or download — Take the list as text or CSV. The whole loop is designed to be repeatable: change the input, read the new result, no re-submit step in between.
The failures people hit are predictable: 16 bytes per key; Random values fragment database indexes; Not human-friendly. Each of those shows up as a specific, fixable symptom rather than a vague error, which is exactly what this tool surfaces.
Primary keys in distributed systems, Idempotency keys, Correlation ids in logs — these are the contexts where UUID shows up, and this page is the fast path between "I have a blob of input" and "I understand what it contains". Keep the tab open next to your editor and your terminal.
Features
v4 (random) and v1 (time-based)
Bulk generation with one click
Uppercase, hyphen and brace formatting options
Copy all or download as CSV
Reference
| Property | Value |
|---|---|
| Format | UUID (Universally Unique Identifier) |
| Extension | .txt |
| MIME type | text/plain |
| Human readable | No |
| Typical use | Primary keys in distributed systems |
Examples
Copy the raw payload out of the network tab, drop it in here, and read the result immediately — no curl round trip, no scratch file.
Paste the snippet from the diff to confirm what it evaluates to before approving the change.
Because processing is local, real payloads with real identifiers can be inspected without violating a data-handling policy.
Benefits
FAQ
1. Pick a version: v4 for general use, v1 when you want time ordering. 2. Set the count: Generate one identifier or a whole batch. 3. Copy or download: Take the list as text or CSV.
No. Everything runs inside your browser, so the file never touches a server — safe for tokens, staging payloads and customer data.
Yes, with no account, no rate limit and no paid tier.
A 128-bit identifier that can be generated independently without collisions. Version 4 is random, version 1 embeds a timestamp and node id
16 bytes per key; Random values fragment database indexes; Not human-friendly.
Once the page has loaded, yes — the processing needs no network access.
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