Is my data private when using UUID Generator & Inspector?

Yes, 100%. All processing and transformations run entirely client-side in your web browser using Web APIs and WebAssembly. No data, text, tokens, or files are ever sent to any remote server.

Is UUID Generator & Inspector free to use?

Yes, all tools on util.farm are completely free, open, and fast with no account registration, ads, or usage limits.

UUID Generator & Inspector

UUIDv4 (Random)

Format:

Quick Copy:

Batch Configuration 10 UUIDs

Quantity:

Max 10k

Delimiter:

Quotes Wrapping:

Framing Preset:

Export / Download:

Generated Output

10 items

Generated in 0.2ms 100% Client-Side Web Crypto

UUID Parser & Inspector

Valid RFC 9562 / RFC 4122 UUID Version 7

Variant: RFC 4122 (10xx)

128-Bit Anatomical Byte Structure: Hover segments for bit allocations

time_low (32b)

018d3b84

time_mid (16b)

48f1

ver + hi (16b)

7c91

var + seq (16b)

9556

node (48b)

91b453e0cf52

Decoded Timestamp: v7 Unix ms

2024-01-23T14:32:10.123Z

~ 2 years ago

Standard / RFC:

RFC 9562 (UUIDv7)

Time-Ordered Epoch Millis

Entropy / Random Bits:

74 Cryptographic Bits

CSPRNG Sub-millisecond

128-bit Decimal (BigInt):

20646193...

Unsigned 128-bit Int

All Formats & Representations

Canonical (8-4-4-4-12):

Uppercase:

Compact (Hex 32):

Braces / GUID:

URN:

Base64URL (22 chars):

Base58 (Short UUID):

Crockford Base32:

C / Rust Byte Array:

128-bit Binary:

Multi-Language Code Snippets

Generate production-ready UUIDs in your favorite programming language.

UUIDv4

UUID Collision Probability & Birthday Paradox Calculator

UUIDv4 provides 122 random bits of entropy (5.3 × 10³⁶ possible IDs). How long until two UUIDs collide?

To reach 50% Collision Risk:

2.71 × 10¹⁸ UUIDs

2.71 Billion Billion UUIDs

At 1 Billion UUIDs / Second:

85.9 Years

Continuous generation without pause

Total UUID Space:

2¹²² ≈ 5.3 × 10³⁶

More than grains of sand on Earth

Identifier System Comparison Matrix

Identifier	Standard	Bits / Size	Sortable?	Time Precision	DB Primary Key Fitness
UUIDv7	RFC 9562 (IETF Standard)	128-bit (36 chars)	Yes (Strict Monotonic)	1 Millisecond	⭐ Optimal (B-Tree friendly)
UUIDv4	RFC 4122	128-bit (36 chars)	No (Random)	None	High B-Tree fragmentation
ULID	Community Spec	128-bit (26 chars Base32)	Yes	1 Millisecond	High (Stores as UUID / binary)
NanoID	Community Spec	Custom (default 21 chars)	No	None	String storage overhead
UUIDv1	RFC 4122	128-bit (36 chars)	No (Low bits first)	100 Nanoseconds	Leaks MAC address & time

Version Specific Parameters