Bulk UUID / GUID Generator & Inspector - 100% Client-Side
Generate thousands of random UUID v4 and time-ordered RFC 9562 UUID v7 identifiers with custom formatting, bulk export, and deep timestamp inspection.
100% Cryptographically Secure: Generated using native Web Crypto API random values with zero network dependencies.
All file encoding, rendering, and transformations run inside local browser memory.
Key Features & Performance Capabilities
Modern UUID v7 & v4 Standards
Generate standard random UUID v4 or modern RFC 9562 UUID v7 with embedded 48-bit millisecond timestamps for high-performance database indexing.
Deep UUID Inspector & Parser
Parse existing UUIDs to extract the exact embedded timestamp, version, variant, and hexadecimal subfields.
Flexible Bulk Formatting Options
Generate 1 to 10,000 UUIDs with uppercase/lowercase toggle, hyphen strip, curly braces wrap, quotes wrap, and comma delimiters.
Multi-Format Instant Export
Download generated UUID batches directly as TXT, JSON array, or CSV format with a single click.
How to Use UUID / GUID Generator & Inspector
Choose UUID Standard
Select UUID v4 for pure randomness, UUID v7 for time-ordered database primary keys, or NIL UUID for testing.
Set Quantity & Formatting
Pick how many identifiers to generate (up to 10,000) and customize formatting (uppercase, hyphens, braces, quotes).
Generate Batch
Click 'Regenerate New Batch' to immediately produce fresh cryptographically random identifiers.
Copy or Export
Copy all generated UUIDs to your clipboard or download them as TXT, CSV, or JSON files.
Understanding UUID Standards: UUID v4 vs Modern UUID v7
The Advantage of Time-Ordered UUID v7 (RFC 9562)
Traditional UUID v4 identifiers are completely random, which causes severe B-tree index fragmentation and performance degradation when used as primary keys in relational databases (PostgreSQL, MySQL, SQLite). UUID v7 solves this problem by embedding a 48-bit Unix epoch millisecond timestamp at the beginning of the identifier, making IDs naturally sortable by creation time while maintaining cryptographic uniqueness.
Cryptographic Entropy & Uniqueness
VicanTools utilizes window.crypto.getRandomValues() to supply high-entropy cryptographically secure pseudorandom numbers (CSPRNG). This eliminates the predictability risks associated with Math.random() and guarantees collision resistance across distributed systems.
Frequently Asked Questions (FAQ)
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