Is the UUID generator free?

Yes. UseDaily's UUID generator is completely free to use with no account needed.

Are the UUIDs truly unique?

Yes. v4 UUIDs use 122 bits of randomness from the browser's secure crypto API, making collisions statistically impossible.

What is a UUID used for?

UUIDs are used as unique identifiers for database records, API resources, sessions, and any system where globally unique IDs are required.

What is the difference between UUID and GUID?

UUID and GUID are the same thing — GUID is Microsoft's term for UUID. Both refer to the same 128-bit identifier standard.

Is the UUID generator free?

Yes. UseDaily's UUID generator is completely free to use with no account needed.

Are the UUIDs truly unique?

Yes. v4 UUIDs use 122 bits of randomness from the browser's secure crypto API, making collisions statistically impossible.

What is a UUID used for?

UUIDs are used as unique identifiers for database records, API resources, sessions, and any system where globally unique IDs are required.

What is the difference between UUID and GUID?

UUID and GUID are the same thing — GUID is Microsoft's term for UUID. Both refer to the same 128-bit identifier standard.

UUID Generator - Developer Tools

Developer Tools

All JSON Formatter JWT Decoder UUID Generator Regex Tester Timestamp Converter Color Converter SQL Formatter XML Formatter Base Converter Hash Generator

UUID Generator·

Generate fresh UUIDs for IDs, mocks, and test data.

uuidguididgenerator

UUID Generator

Format, decode, generate, and validate developer data locally.

input.txt

plaintext·0 chars·1 lines

Ln 1, Col 1·UTF-8·LF

input.txtRead-Only

plaintext·0 chars·1 lines

Ln 1, Col 1·UTF-8·LF

UUID Generator

UseDaily's free online UUID generator creates cryptographically random version 4 UUIDs (Universally Unique Identifiers) instantly in your browser. Use them for database primary keys, test fixtures, API mocks, or any system that requires globally unique identifiers.

How to Use

Click the Refresh UUID button to generate a new UUID. The output is ready to copy with one click. Each generation creates a fresh, cryptographically random v4 UUID.

Who Is This For?

Backend Developers: Generate primary keys, correlation IDs, and idempotency tokens for APIs.
Frontend Developers: Create temporary IDs for UI state, drag-and-drop keys, and mock data.
QA Engineers: Produce unique test identifiers for test cases and fixtures.

Key Features

v4 UUIDs

Generates cryptographically random RFC 4122 version 4 UUIDs on every click.

One-Click Copy

Copy the generated UUID to your clipboard instantly without selecting text.

No Server Required

UUID generation uses the browser's crypto API — no network requests needed.

Privacy Focused

All processing happens in your browser. Your data is never sent to any server.

Frequently Asked Questions

Is the UUID generator free?: Yes. UseDaily's UUID generator is completely free to use with no account needed.
Are the UUIDs truly unique?: Yes. v4 UUIDs use 122 bits of randomness from the browser's secure crypto API, making collisions statistically impossible.
What is a UUID used for?: UUIDs are used as unique identifiers for database records, API resources, sessions, and any system where globally unique IDs are required.
What is the difference between UUID and GUID?: UUID and GUID are the same thing — GUID is Microsoft's term for UUID. Both refer to the same 128-bit identifier standard.

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Developer Tools

All JSON Formatter JWT Decoder UUID Generator Regex Tester Timestamp Converter Color Converter SQL Formatter XML Formatter Base Converter Hash Generator

UUID Generator·

Generate fresh UUIDs for IDs, mocks, and test data.

uuidguididgenerator

UUID Generator

Format, decode, generate, and validate developer data locally.

input.txt

plaintext·0 chars·1 lines

Ln 1, Col 1·UTF-8·LF

input.txtRead-Only

plaintext·0 chars·1 lines

Ln 1, Col 1·UTF-8·LF

UUID Generator

How to Use

Click the Refresh UUID button to generate a new UUID. The output is ready to copy with one click. Each generation creates a fresh, cryptographically random v4 UUID.

Who Is This For?

Backend Developers: Generate primary keys, correlation IDs, and idempotency tokens for APIs.
Frontend Developers: Create temporary IDs for UI state, drag-and-drop keys, and mock data.
QA Engineers: Produce unique test identifiers for test cases and fixtures.

Key Features

v4 UUIDs

Generates cryptographically random RFC 4122 version 4 UUIDs on every click.

One-Click Copy

Copy the generated UUID to your clipboard instantly without selecting text.

No Server Required

UUID generation uses the browser's crypto API — no network requests needed.

Privacy Focused

All processing happens in your browser. Your data is never sent to any server.

Frequently Asked Questions

Is the UUID generator free?: Yes. UseDaily's UUID generator is completely free to use with no account needed.
Are the UUIDs truly unique?: Yes. v4 UUIDs use 122 bits of randomness from the browser's secure crypto API, making collisions statistically impossible.
What is a UUID used for?: UUIDs are used as unique identifiers for database records, API resources, sessions, and any system where globally unique IDs are required.
What is the difference between UUID and GUID?: UUID and GUID are the same thing — GUID is Microsoft's term for UUID. Both refer to the same 128-bit identifier standard.