Bundlephobia
bundlephobia.com
Shows what an npm package costs your bundle before you install it
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uuidgenerator.net
Hands you a fresh UUID on page load, single or in bulk.
A single-purpose page that generates a UUID the moment it opens, with tabs for version 1, version 4, the newer time-sortable version 7, and the nil UUID. The bulk mode generates a batch of v4 values and offers them as a download, which is enough for seeding fixtures. Values are produced on their server rather than in your browser, so for anything where unpredictability actually matters you should generate them in your own code.
AltFTool does this too
If you would rather not leave the site, UUID Generator covers the same job here — free, no account, and it runs in your browser.
Open UUID GeneratorQuestions
Works the moment the page loads. No account, no email, no trial. Values come from their server, not your machine — fine for test data, wrong for anything security-sensitive.
Yes. UUID Generator sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
Values come from their server, not your machine — fine for test data, wrong for anything security-sensitive.
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