RootUtils

UUID Generator

Client-Side Secure

Free UUID generator & validator (v1–v8). Generate v4/v7/v6, create name-based v3/v5 UUIDs, inspect versions/variants, decode timestamps, and convert UUIDs to bytes/base64 — client-side.

UUID Master

Generate, validate, parse, and convert UUIDs (v1–v8).

Cryptographically random UUIDs.

max 10,000

Tip: you can go up to 10,000 in one shot.

Unique feature

Monotonic UUID v7 bulk generation helps keep IDs ordered even when many are created within the same millisecond.

Output

Is this tool broken?

Let us know if you found a bug or have a feature request.

UUID Generator & Validator (JavaScript) — v4 + Time-Ordered UUIDs (v7)

RootUtils UUID Master is a client-side UUID toolkit for creating, validating, and formatting UUIDs. Generate random UUID v4 and (when supported by your tool) time-ordered UUID v7 for sortable IDs. Validate UUID strings, batch inspect lists, and export results in formats that are ready for SQL, JSON, and logs.

Everything runs locally in your browser. Your UUIDs and input text are not uploaded by this page.

Related tools: Base64 Converter, JWT Decoder, JSON Formatter.

Secure generation

UUID v4 uses Web Crypto where available for high-quality randomness (CSPRNG).

Bulk + formatting

Generate large batches and format output with hyphens, uppercase, braces, or quotes for DB inserts.

Debug-friendly

Copy single IDs, copy all, and visually scan lists with quick structure checks.

How to use the UUID Generator

  1. Choose how many UUIDs you need (single or bulk).
  2. Select your output format (hyphens, uppercase, braces, quotes).
  3. Click Regenerate to create a fresh batch.
  4. Click any UUID to copy it instantly.
  5. Use Copy All to export the full list for SQL/JSON.
Example (SQL)
INSERT INTO users (id, email)
VALUES ('550e8400-e29b-41d4-a716-446655440000', 'john@example.com');
Example (JSON)
{
  "id": "550e8400-e29b-41d4-a716-446655440000"
}

Which UUID version should you use?

  • v4 (random): best default for unique identifiers in most apps.
  • v7 (time-ordered): best when you want IDs that roughly sort by creation time (helpful for logs and DB indexes).
  • v3 / v5 (name-based): deterministic IDs (same namespace + name → same UUID) — useful for stable identifiers.

Note: Support depends on what you’ve implemented in this tool. Keep the UI and this guide aligned so claims stay accurate.

FAQ

Is UUID v7 better than v4?
They solve different problems. v4 is purely random. v7 is time-ordered (sortable) and still includes randomness. Choose v7 when ordering matters.
Can UUIDs collide?
In theory yes, but with proper randomness the probability is extremely low for typical applications. Use Web Crypto / CSPRNG sources where possible.
Should I store UUIDs as text or binary?
Text is simplest and portable. Binary can save space and sometimes improve index performance, but requires careful encoding/decoding.
Are UUIDs safe for secrets?
UUIDs are identifiers, not secrets. Don’t use them as passwords or API keys. Use dedicated token generators for secrets.

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