Build your Password Generator with AI in under 5 minutes

Build a browser-side password and passphrase generator with crypto.getRandomValues randomness, a Diceware passphrase mode, an entropy strength meter, and one-click copy — wrapped in a bank-vault visual identity nobody else ships.

Como funciona

Passo 1

Descreva a sua ideia

Escreva um prompt em texto simples descrevendo o que pretende.

Passo 2

A IA cria

O FloopFloop gera código pronto para produção instantaneamente.

Passo 3

Implementar e lançar

O seu projeto é alojado no seu próprio subdomínio em minutos.

Por que criar com IA em vez de contratar um programador?

	FloopFloop	Programador tradicional
Tempo até ao lançamento	Menos de 5 minutos	2 a 8 semanas
Custo	A partir de 0 $	5.000 $ - 50.000 $+
Manutenção	Incluída	Retainer contínuo

What is a password generator?

Password generators are one of the most-searched developer-utility categories on the web — somewhere between 5 and 10 million queries per month across the English-speaking internet for 'password generator', 'random password', and the variants. The category is dominated by ad-supported hosted sites (passwordsgenerator.net, random.org/passwords, the in-product generators from LastPass / 1Password / Bitwarden / NordPass) that all work the same way: pick a length and some toggles, get a random string. None of them ship a memorable visual identity beyond their parent product's brand chrome; many of them gate passphrase mode (the genuinely-useful feature for human-memorable secrets) behind sign-up; some of them generate the password SERVER-SIDE (Random.org's documented behaviour), which means the secret your account depends on briefly existed on a third party's machine. The actual logic is tiny — a CSPRNG call, a character-set builder, a Shannon entropy formula, a wordlist for Diceware. Owning the page yourself means the secret never leaves your browser, the bundle is ~30 kB, and you can extend the generator with whatever the hosted tools don't ship (Diceware short list vs long list, custom alphabet for specific site requirements, multi-output batch mode, QR code for mobile transfer) by asking the AI for one more prompt.

Common features

WebCrypto crypto.getRandomValues — never Math.random()
Rejection sampling to eliminate modulo bias
Random mode: length 4–64, A-Z/a-z/0-9/symbols toggles, exclude-similar toggle
Passphrase mode: 3–12 words, 4 separator options, capitalise toggle
Cohort-guarantee enforcement: one character from each enabled cohort, Fisher-Yates shuffled
Shannon entropy display with four-bar segmented strength gauge
NIST-aligned strength labels (Very weak / Weak / Decent / Strong / Excellent)
Reveal/hide toggle for the readout
One-click copy with 30s auto-fade indicator
Settings persist to localStorage (length + toggles); generated values never do
Force-static single page — no server round-trip, CDN-cached

Real-world examples

Setting up a new password manager master password

User opens the vault, switches to Passphrase mode, picks 7 words with dash separators, sees the entropy meter read 'Strong — 56 bits' in the 1Password-recommended band. Generates a passphrase like 'amber-arena-crisp-bake-helmet-flag-route', writes it on a piece of paper, sets it as their vault master, throws the paper in a desk drawer for the inevitable 'I forgot the master' moment two years from now.

Generating a Wi-Fi password for the office guest network

IT admin opens the vault, Random mode, length 16, no symbols (router admin UI fights special characters), excludes similar chars (printed on a card and read aloud over the phone — Os and zeros confuse people). Copies, pastes into the router config, prints the card, sticks it next to the door.

Throwaway test-account password for a CI run

Developer needs a 20-char random password to seed a Playwright test user. Hits Generate, copies, pastes into the .env.test file. The vault never persisted the value; the .env.test file is gitignored. No password-manager round-trip, no 'shall I save this' browser popup.

Why FloopFloop fits password generator projects

The reason passwordsgenerator.net and friends exist is that wrapping crypto.getRandomValues in a webpage is a viable business model — ads and minimal effort, nothing else. The unique thing FloopFloop ships on top of that is the *aesthetic*: brushed steel panels with rivet-bolted corners, a recessed 'vault window' framing the generated readout like a tumbler-lock face, a brass-bevel GENERATE button that presses like a real dial, and embossed Oswald display type for the section labels. Five colour variants (classic brass safe, bank vault gold on navy, cyber vault with electric cyan, library card-catalog in oak + cream as a light variant, spy briefcase with amber warning lights) cover the obvious use cases. The whole thing is client-side, so the visual IS the differentiator — exactly the dimension where AI-generated styling wins against every hosted competitor.

Experimente estes prompts

Copie qualquer prompt abaixo e cole-o no FloopFloop para começar.

Build a password generator with two modes — random characters and Diceware-style passphrase. Random mode: length slider (4-64), character-set toggles (A-Z, a-z, 0-9, symbols), and an 'exclude similar' toggle that drops 0/O/1/l/I. Passphrase mode: word-count slider (3-12), separator picker (dash/dot/space/underscore), capitalise toggle. Both modes draw randomness from crypto.getRandomValues (NOT Math.random) with rejection sampling to avoid modulo bias. Entropy strength meter at the bottom of the readout (4-bar segmented gauge). Reveal/hide toggle, copy button with auto-fade after 30s. Settings persist to localStorage; generated values never do. Visual: bank vault — gunmetal steel panels with rivet-bolted corners, recessed 'vault window' for the readout, brass-bevel CTA, embossed Oswald display type. No dark/light toggle — the vault is the vault.

Create a passphrase generator for someone who hates remembering random strings. Diceware mode only — pick 5-7 short common words from a 256-word list, separator of choice. Show the entropy in bits next to a 4-bar strength meter. Big 'reroll' button at the top. Copy-to-clipboard with the standard browser API. Save the user's preferred word count + separator to localStorage; the words themselves are throwaway and never stored.

Build a corporate-IT-style password tool: random mode with strict character-set requirements (must include upper, lower, digit, symbol — enforced by forcing one char from each cohort before filling the rest, then Fisher-Yates shuffle). Length range 12-48. Entropy readout in plain English ('Strong — 96 bits') with a NIST-aligned thresholds table. No persistence at all. Single button: GENERATE. Output styled in monospaced JetBrains Mono so glyphs are unambiguous when transcribed.

Build a password vault with five visual variants: classic brass safe (gunmetal + warm amber), bank vault gold (navy + rich gold), cyber vault (near-black + electric cyan), library card-catalog (oak + cream — light variant), spy briefcase (charcoal + amber LED warning lights). Same rivet-bordered vault face + recessed window + brass dial CTA across all of them — only the metal tone and canvas swap so the cohort reads as one identifiable thing.

Perguntas frequentes

How is this different from passwordsgenerator.net or the LastPass / 1Password generators?

Hosted password generators work but they're surrounded by ads, log every request you make to their servers (the password is generated server-side at some of them), and the password-manager-vendor generators gate the more useful features (passphrase mode, custom alphabets, entropy display) behind a sign-in. The version FloopFloop generates is yours — every byte runs in the browser via crypto.getRandomValues (cryptographically-secure WebCrypto RNG), nothing ever round-trips to a server, and the visual (bank-vault metal panels, recessed window, brass dial CTA) is the kind of aesthetic identity no SaaS competitor ships.

Is crypto.getRandomValues actually cryptographically secure?

Yes — it's the WebCrypto-spec CSPRNG, exposed in every browser since ~2014. The underlying entropy source is the OS-level secure RNG (/dev/urandom on Linux/macOS, CryptGenRandom on Windows). The template's randomIndex helper additionally uses rejection sampling to avoid the modulo bias you'd get from naive `random % max` — the first `2^32 mod max` values otherwise have slightly higher probability than the rest, biasing the output. Both pieces matter: the right RNG with biased sampling still leaks bits.

What does the entropy meter actually measure?

Shannon entropy in bits: log2(alphabet size) × password length. For a 20-character password drawn from a 94-symbol alphabet that's log2(94) × 20 ≈ 131 bits — well above the 80-bit 'throwaway-key' threshold most password managers use as the safe target. The meter's four bars map to: < 28 bits (Very weak — resists only casual guessing), 28-60 (Weak — falls to a consumer GPU offline crack), 60-80 (Decent — resists most attacks), 80-100 (Strong — the modern industry safe target), 100+ (Excellent — conservatively beyond near-future attack capability). Passphrases use log2(wordlist size) × word count, which is why a 6-word passphrase from a 1296-word EFF list (62 bits) is comparable to a 10-character random password.

Why both random AND passphrase modes?

Different use cases. A random 20-character password has high entropy per character but is impossible to type accurately or remember — so it lives in a password manager and the user copy-pastes it. A 6-word passphrase has similar entropy but is easy to type on a phone keyboard, easy to read aloud over a phone call, and easy to memorise after a few uses — so it's the right shape for a master password (the one secret you can't store in a password manager), a Wi-Fi password printed on a guest card, or an encryption passphrase for a backup drive. Both belong in a serious generator; sites that ship only random-character mode are doing half the job.

Are the generated values stored anywhere?

No — that's the point. The user's *settings* (length, character-set toggles, word count) persist to localStorage so the next visit picks up where they left off. The generated value itself is held only in component state — never written to localStorage, never sent to a server, never logged. The 'Reveal/Hide' toggle masks the readout while you copy. The 'Copied' indicator auto-clears after 30 seconds so you don't see a stale 'Copied' status hours after you walked away.

Does the random mode guarantee every character class appears?

Yes — when the password is long enough to make it possible (length ≥ number of enabled cohorts). The generator first picks one character from each enabled set, then fills the rest from the combined alphabet, then Fisher-Yates shuffles the result. This biases the distribution very slightly (a strict-uniform sample could legitimately produce 'all lowercase' by chance with all cohorts enabled), but every reputable password tool ships this guarantee because a password that satisfies the user's toggles but is rejected by the target site's validator is useless. The entropy estimate is an upper bound either way — the shuffle keeps it close.

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