Is my data stored or sent anywhere?

No. Everything runs entirely in your browser using JavaScript and the Web Crypto API. Nothing is sent to any server. This tool is 100% client-side and privacy-first.

What UUID versions are supported?

We support UUID v4 (random), UUID v1 (timestamp + MAC-based), and UUID v7 (Unix timestamp-based, RFC 9562). UUID v7 is recommended for database primary keys as it is naturally sortable.

How many UUIDs can I generate at once?

You can generate up to 10,000 UUIDs at once and export them as CSV or JSON. All generation happens instantly in your browser.

Effloow / Tools / Developer Utilities Hub

Tool Forge Free Privacy-First

Developer Utilities Hub

UUID generator, Unix timestamp converter, and hash generator in one place. Bulk operations, CSV/JSON export, zero tracking. 100% client-side — your data never leaves your browser.

Options

UUID Version

Quantity

Format

Generated UUIDs

0 UUIDs

Click "Generate" to create UUIDs.

100% client-side. Nothing is sent to any server. Your data stays in your browser.

Developer Utilities Hub

Options

UUID v7 Timestamps

Generated UUIDs

Unix Timestamp → Human Date

Human Date → Unix Timestamp

Live Clock

Input

Hash Results

Hash Comparison