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Generators

Password, UUID, random number, placeholder text and sample data generators for testing and everyday use.

9 tools · all free, all run in your browser

Generators produce the filler and the identifiers that development, testing and everyday admin constantly need: a strong password for a new account, a batch of UUIDs for seed data, placeholder paragraphs for a layout, or a set of plausible-looking names and addresses to populate a staging database. Each generator lets you control quantity and format, and produces a fresh batch on demand so you are never stuck with a single example.

What makes a password strong

Strength comes overwhelmingly from length. Each additional character multiplies the search space, so a long passphrase drawn from a large alphabet beats a short string peppered with substitutions. The old advice to replace letters with lookalike symbols adds very little, because attackers' wordlists already include those substitutions. What genuinely helps is length, uniqueness across sites, and a password manager so you never have to remember any of them.

Identifiers and collisions

A version 4 UUID carries 122 random bits, with the remaining six fixed to mark the version and variant. That yields roughly 5.3 undecillion possibilities, which is why applications treat a random collision as effectively impossible and generate UUIDs client-side without coordinating with a central authority. This makes them well suited to distributed systems, offline-first apps and merging records from separate sources.

Test data should look fake

Generated names and addresses here are deliberately fictional and are meant for filling forms, seeding staging environments and testing layouts against realistic-looking strings. They are not real people or deliverable addresses. Using obviously synthetic data in test environments is also a safety measure: it prevents real personal data from leaking into systems that are not built to protect it.

Generators — questions

Are the generated passwords cryptographically secure?
They come from a seeded pseudo-random generator, which is fine for everyday accounts and test data but is not a cryptographically secure source. For high-value secrets, use the generator built into a reputable password manager.
Are generated passwords stored or transmitted?
No. They are produced in your browser and never sent anywhere. Nothing is logged or retained once you leave the page.
Can I generate more than one at a time?
Yes. The generators accept a count so you can produce a batch, then copy the whole list or individual items.
Are the fake names and addresses real?
No. They are randomly assembled from component lists and are intended purely as test data. Any resemblance to a real person or deliverable address is coincidental.

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