Generate RFC 4122 version 4 UUIDs in bulk, instantly.
Create cryptographically strong version 4 UUIDs for database keys, correlation IDs, and testing fixtures — entirely in your browser.
Version 4 (random) via crypto.randomUUID() in supporting browsers.
Collisions are astronomically unlikely for v4 UUIDs in normal use.
Use ToolVera’s UUID generator to create one or many v4 IDs in a single click, then copy the list into fixtures, seeds, or spreadsheets. Generation uses the browser’s crypto APIs.
Yes—v4 UUIDs are common for distributed IDs. Prefer uppercase/lowercase consistently with your schema, and note that random UUIDs are not sortable by creation time.
Create UUID v4 identifiers locally for fixtures, database seeds, and API tests with ToolVera’s free UUID generator.
Read: Generate UUIDs in Your Browser for Testing and IDs →Beautify or minify JSON with clear validation errors.
Developer Tools
Convert Unix timestamps to dates and back using your local timezone.
Developer Tools
Generate strong random passwords with customizable character sets.
Productivity Tools
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text in your browser.
Developer Tools
Convert CSV to JSON and JSON to CSV privately in your browser.
Developer Tools
Generate cryptographically strong random integers in a range.
Productivity Tools