हिंदी

UUID Generator

Generate random version 4 UUIDs (also called GUIDs) for database IDs, test data or file names.

How to use

  1. Choose how many UUIDs you need.
  2. Choose uppercase or no hyphens if your system needs it.
  3. Click Copy to copy them all, one per line.

How it works

Each UUID is created with crypto.randomUUID(), which uses 122 random bits. The chance of two ever being the same is so small that it can be ignored in practice.

Frequently asked questions

What is the difference between UUID and GUID?

They are the same thing. GUID is the name Microsoft uses.

Are these UUIDs unique?

Version 4 UUIDs are random, and collisions are practically impossible.

What does the "4" in the UUID mean?

The first digit of the third group shows the version. Version 4 means the UUID was made from random numbers.

More tools

JSON Formatter Free JSON formatter and validator. Beautify or minify JSON, sort keys and find errors with line and column numbers. Runs in your browser. Base64 Encode / Decode Free Base64 encoder and decoder. Convert text to Base64 and back with full UTF-8 support, including Hindi and emoji. URL-safe option included. URL Encode / Decode Free URL encoder and decoder. Convert spaces, Hindi and special characters to percent encoding (%20) and back. Runs in your browser. Password Generator Free strong password generator. Create random, secure passwords with letters, numbers and symbols. Generated in your browser, never sent anywhere. Hash Generator Free hash generator. Create SHA-256, SHA-1, SHA-384 and SHA-512 hashes of any text, calculated in your browser with the Web Crypto API. Unix Timestamp Converter Free Unix timestamp converter. Convert epoch time in seconds or milliseconds to a readable date in your time zone and UTC, and back. Online Calculator Free online calculator with basic and scientific modes. Works like the calculator on your phone, with keyboard support, percentages and history. Date Calculator Free date calculator. Count the days between two dates, or add or subtract days from a date. Shows weeks, weekdays and years-months-days.