UUID, GUID & Crypto Hash Studio
Generate UUID v4/v7, GUID, NanoID and compute cryptographic hashes (MD5, SHA-256, HMAC, File Checksum) 100% in-browser.
🔒 Secure CSPRNG
⚡ UUID v4 • v7 • GUID
🛡️ MD5 • SHA-256 • HMAC
📁 File Checksum
Instant UUID:
00000000-0000-4000-8000-000000000000
⚙️ Generation Options
10
📋 Generated Results
What is an UUID/GUID and what are the differences between versions?
A UUID (Universally Unique Identifier) is a 128-bit identifier standardized in RFC 4122 and RFC 9562. Version 4 is generated using pure CSPRNG randomness. Version 7 embeds a millisecond Unix Epoch timestamp, guaranteeing monotonic time-ordering ideal for database primary keys (PostgreSQL, MySQL, SQLite, MongoDB).
Cryptographic Hashing Algorithms
- SHA-256 / SHA-512: SHA-2 family standards, collision resistant and used in blockchain, SSL certificates, and digital signatures.
- HMAC-SHA256: Secret-key Message Authentication Code for secure Webhook and API signing (GitHub, Stripe, JWT).
- MD5 & SHA-1: Fast algorithms ideal for file integrity checksums and deduplication.
100% In-Browser Privacy
All UUID generation and hash digest calculations run purely inside your local browser memory using native Web Cryptography APIs. No data is ever transmitted to servers.