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NJHTools

Generators & Everyday Utilities

Sometimes you just need something made for you, right now: a strong password for a new account, a batch of UUIDs for test data, a QR code for a flyer, or a few paragraphs of placeholder text for a mockup. This collection brings those quick generators together with a few everyday utilities that are handy to keep a tab away.

The Password Generator and Random Number Generator use the browser's cryptographically secure crypto.getRandomValues(), so results are suitable for real credentials and fair draws. The UUID Generator creates version 4 UUIDs in bulk, the QR Code Generator makes codes for links, text, Wi-Fi and email and downloads them as PNG or SVG without a watermark, and the Lorem Ipsum Generator outputs words, sentences or paragraphs as plain text, HTML or JSON. For decisions and games there is a coin flip, dice roller and random picker, and for focus sessions a countdown timer with a Pomodoro preset and a lap stopwatch.

Nothing you generate is sent to or stored on a server — it exists only in your browser until you copy it.

All Generators (8)

Frequently Asked Questions

Are the generated passwords secure?↓

Yes. The Password Generator uses crypto.getRandomValues(), a cryptographically secure random source built into your browser, and passwords are never transmitted or stored.

Which UUID version does the UUID Generator create?↓

Version 4 (random) UUIDs via crypto.randomUUID(), with options for uppercase and hyphen formatting and bulk generation.

Do QR codes from the QR Code Generator expire?↓

No. The codes are static — the content is encoded directly in the image, not routed through a redirect service — so they work for as long as the encoded link or text is valid.

Is the random number generator truly random?↓

It uses the browser's cryptographically secure random number generator, which is suitable for raffles, draws and games. You can also generate lists of unique numbers or pick random items from your own list.

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