What to select
Choose how many UUID v4 values to create. No source data is required.
UUID Generator
Generate one or more cryptographically random UUID v4 values.
We use reasonable safeguards to help protect your files and information while you use the service.
What this developer tool does
Generate one or many RFC 4122 UUID v4 identifiers with the browser's cryptographically secure random source.
How to use UUID Generator
- Choose a count from 1 to 100.
- Generate the identifiers.
- Copy or download the newline-separated values.
Example
Each result follows the xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx form.
Practical note: Random UUIDs are identifiers, not passwords or proof of authorization.
Supported formats
Plain text, JSON, XML, standard or URL-safe Base64, URL components, UUID v4, secure passwords, SHA-256, SHA-384, SHA-512 and CRC32.
Limits and safety
Text input is limited to 1,000,000 characters per task, UUID generation to 100 values, and passwords to 8–128 characters.
Frequently asked questions
Is my input uploaded or saved?
No. These developer utilities process input only in this browser tab.
Can a generated hash be reversed?
No. Cryptographic hashes are one-way values. CRC32 is a checksum for detecting accidental changes, not a security hash.