Generate RFC 4122 v4 UUIDs in bulk with one-click copy.
Generate cryptographically-random version 4 UUIDs — one at a time or up to 100 at once — for IDs, fixtures, request tracing and database keys.
100% client-side — zero uploads, maximum privacy
Instant results — no waiting for server processing
Secure — your data never leaves your browser
Free to use — no sign-up required
Handles real-world edge cases — malformed input, nested structures, large payloads
Syntax highlighting for easier reading and debugging
Copy-to-clipboard in one click — paste directly into your editor or terminal
Works with JSON, YAML, XML, CSV, Base64, JWT, and more
No file size limits for text processing
Generate unique IDs for database records and API resources
Create UUIDs for distributed system event tracking
Generate test fixtures with realistic UUID values
Create collision-free identifiers for session tokens
Batch-generate UUIDs for data migration scripts
Yes. They are generated with crypto.randomUUID() (v4), backed by the operating system's cryptographically secure RNG.
Format, minify and validate JSON with syntax error details and document stats.
Convert CSV to JSON and JSON to CSV with delimiter and quote support.
Test regular expressions with live match highlighting, groups and flags.
Encode text or files to Base64 with URL-safe and Unicode support.
Decode Base64 strings back to text or files with Unicode support.
Percent-encode URL strings for query parameters and paths.