UUID Generator

Create random v4 or sortable v7 UUIDs in bulk — cryptographically secure and generated in your browser.

How to use UUID Generator

What’s the difference between UUID v4 and v7?

v4 is fully random. v7 starts with a timestamp, so IDs sort in creation order — better for database indexes.

Is a UUID the same as a GUID?

Yes. GUID is Microsoft’s name for the same 128-bit identifier format.

Can two UUIDs collide?

In practice, no — the chance is astronomically small.

Compute MD5 and SHA checksums for text or any file — and check a download against its published hash.

Turn epoch timestamps into readable dates and back — with automatic unit detection and a live clock.

Beautify, minify and validate JSON instantly with syntax highlighting and precise error locations.

Turn JSON into spreadsheets and spreadsheets into JSON — nested objects flattened, Excel-ready output.

Convert text and files to Base64 and back. UTF-8 safe, URL-safe variant and data URL output included.

Percent-encode text for safe URLs or decode %-sequences back to readable text, with a query-string breakdown.