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.
Supported formats
Plain text, JSON, XML, standard or URL-safe Base64, URL components, UUID v4, SHA-256, SHA-384, SHA-512 and CRC32.
Limits and safety
Text input is limited to 1,000,000 characters per task, and UUID generation is limited to 100 values at a time.
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.