Your next login deserves better than a short password with a few symbols swapped in. A multilingual passphrase generator strings together random words drawn from wordlists in several languages, so you get a long secret that is hard to guess but still easy to say out loud. Set a word count, pick your languages, and copy the result with one click.
How a Multilingual Passphrase Generator Works
A passphrase is a sequence of unrelated words joined by a separator, such as harbor-wolke-miel-lampa-tigre. A generator builds it by picking words at random from a predefined wordlist, one position at a time. Because each pick is independent, the result carries no meaning an attacker could exploit, and its strength comes from length and randomness rather than from clever character swaps. Run the free diceware passphrase generator whenever you need another one — it only takes a few seconds.
A multi language passphrase generator adds one step: before picking, it merges the wordlists you selected into a single pool. Every word in that pool is equally likely, so a bigger pool means more possible passphrases for the same word count. That is why mixing languages raises passphrase strength without making the phrase any longer.
The diceware idea behind the wordlist
The method traces back to diceware, where five rolls of a six-sided die choose one word from a list of 7,776 entries (65). The EFF English wordlist follows that design, and community wordlists for other languages copy it. Any list of that size gives roughly 12.9 bits of randomness per word, which is the building block of every calculation on this page.
What happens when you click the button
- The tool reads your word count, separator and capitalization choices.
- It draws that many words from the combined pool using the browser's secure random source.
- It joins them, applies your options, and shows the passphrase strength estimate next to the result.
- You copy and save the passphrase into your password manager.
Random Passphrase Generator Settings You Can Change
Every setting trades a little convenience for strength, so it helps to know what each one does before you generate passphrases for real accounts. The recovery backup codes generator is completely free to use, with no rate limits, watermarks, or hidden restrictions.
Word count
The word count is the single biggest lever. Each extra word multiplies the number of possibilities by the size of the pool. Aim for at least four words for low-value logins and five or six for anything that protects money, email or a vault.
Word separator
The separator joins the words: a hyphen, a space, an underscore or a full stop. A word separator does not add much randomness by itself, but it keeps the phrase readable and satisfies sites that insist on punctuation. Pick one you can type on every keyboard layout you use.
Capitalization and numbers
Capitalization of each first letter and an optional digit help you pass strict site rules, yet they add only a few bits. Treat them as compatibility options, not as a replacement for another word.
Passphrase Strength and Entropy by Word Count
Strength is measured as entropy, the number of bits needed to describe the choice you made. For a pool of L equally likely words and n words in the phrase:
$$H = n \times \log_2(L)$$
Five or more random words give you high entropy even without a single symbol. The expected crack time assumes an attacker who knows the generator and its wordlist, and who on average searches half the possibilities at R guesses per second:
$$T = \frac{2^{H}}{2 \times R}$$
The table below uses a single 7,776-word list against a pool of four such lists (31,104 words), with an offline attacker making one trillion guesses per second.
| Words | One list: bits | One list: crack time | Four lists: bits | Four lists: crack time |
|---|---|---|---|---|
| 4 | 51.7 | about 29 minutes | 59.7 | about 5 days |
| 5 | 64.6 | about 165 days | 74.6 | about 460 years |
| 6 | 77.5 | about 3,500 years | 89.6 | about 14 million years |
| 7 | 90.5 | about 27 million years | 104.5 | about 446 billion years |
Read the table across a row to see what extra languages buy you, and down a column to see what an extra word buys you. Five words drawn from the four-list pool reach 74.6 bits, which falls just short of six words from one list at 77.5 bits, so pick whichever phrase is easier for you to type.
Why a bigger pool raises entropy
Doubling the pool adds exactly one bit per word, because \(\log_2(2L) = \log_2(L) + 1\). Going from one 7,776-word list to four lists adds two bits per word, which is why a five-word phrase gains ten bits overall. Length still wins in the long run: one more word adds about 13 to 15 bits at once.
Choosing a Wordlist for Your Languages
The generator's wordlist decides which words can appear, so it is worth knowing where each list comes from. Open projects such as CosmoPass collect community lists under their own licenses, and each list stays the property of its author.
- The English wordlist from the EFF is the common starting point for diceware-style phrases.
- German, Czech, Danish and Catalan lists follow the same dice-based design.
- Hungarian, Estonian and Bulgarian lists suit speakers who want phrases in their own language.
- Indonesian and Chinese (written in Pinyin so the words stay typeable) cover non-European users.
Check each list's license before you redistribute it. Several are shared under Creative Commons terms, and a few under the GNU GPL.
Typing words outside your own language
Accented letters can be awkward on a phone or a borrowed keyboard. If a list contains them, test one phrase on every device you use. When it fails, choose the Pinyin or an unaccented list and add a word to make up the lost bits.
Why Use a Multi Language Passphrase Generator
A free passphrase generator that covers several tongues does three practical things for you.
- It widens the pool. More words per slot means more entropy at the same length.
- It defeats lazy dictionary attacks. Cracking tools try common English words first, so a phrase mixing German, Catalan and English words falls outside their first guesses.
- It improves memorability for multilingual people. Words you already know in your second language stick as easily as English ones, which makes memorable passphrases easier to build.
Remember the limit: an attacker who knows the generator and the lists you picked still faces the full pool, which is why the table above counts the pool and never gives credit for hoping nobody notices your language choice.
Passphrase Best Practices Against Brute-Force Attacks
A long passphrase resists brute-force attacks because every added word multiplies the work for hackers. It also resists dictionary attacks, but only when the words are chosen by software and not by you. Strong passphrases are long, random and used once.
Avoid personal information
Your dog's name, your street or a favorite film makes a phrase easy to remember and just as easy for a stranger to find online. Let the generator choose, and use random words that have no link to each other.
Skip common dictionary words you picked yourself
Hand-picked dictionary words such as "password" or "sunshine" are predictable. Random draws from a large list avoid that bias, because no human taste is involved.
Use uppercase and lowercase, numbers and symbols only when needed
Mixing uppercase and lowercase letters or adding numbers and symbols can satisfy a form, but a sixth word is stronger than any of them. Complexity rules matter less than length, which matches the NIST guidelines favoring longer passwords over forced special characters.
Never reuse a passphrase
Reused passwords fuel credential stuffing, where criminals replay logins leaked in data breaches on other sites. Generate a new phrase for each important account, and let the vault hold the rest.
Setting a Vault Master Password with a Free Passphrase Generator
Marta, a translator who works between English, German and Czech, is replacing the master password on her vault after a laptop upgrade. She wants something she can type from memory in any of her three working languages, so she opens the generator and ticks the three wordlists. Each list holds 7,776 words, which gives a combined pool of 23,328 words.
First she enters a word count of 5 and a hyphen as the separator. The tool reports 72.55 bits of entropy, computed as 5 × log2(23,328). At one trillion guesses per second, an attacker who knows her lists needs about 109 years on average. That sounds long, but her vault holds client contracts, and a stolen vault file can be attacked offline for far longer than a login page allows.
So she changes one input and sets the word count to 6. The estimate jumps to 87.06 bits, roughly 2.55 million years at the same guess rate. The generated phrase is 34 characters long, comfortably inside the 64-character minimum that NIST SP 800-63B says verifiers must accept for memorized secrets, so her password manager will not truncate it.
- Inputs: three wordlists, 6 words, hyphen separator, no digit.
- Result: 87.06 bits of passphrase strength.
- Decision: keep six words for the vault and drop to five only for lower-value logins.
Before she commits, Marta types the phrase twice on her phone keyboard. A Czech word with an accented letter fails the second time, so she regenerates until all six words are plain ASCII, saves the result as her new master password, and writes nothing down.
Passphrase vs Password Generator: When to Use Each
A password generator produces a strong password as a random string of characters that is short, dense and meant to live in a password manager. A passphrase suits the few secrets you must recall without help, such as your master password, a laptop disk login or a code you read over a phone call.
| Need | Better choice | Reason |
|---|---|---|
| Master password for your vault | Passphrase | Easier to remember and type |
| Everyday website login | Password generator | Stored and autofilled, so memorability is irrelevant |
| Secret you must say aloud | Passphrase | Words are easier to pronounce than random strings |
Storing Passphrases in a Password Manager
Few people can remember dozens of long phrases. A password manager solves that with secure storage in an encrypted vault, autofill at login and sync across devices. The one secret you carry in your head is the master password, and a six-word passphrase is an excellent choice for it. Add two-factor authentication (also called two-step login) and, where supported, one-time passwords for a second layer, and you protect accounts even if a phrase leaks.
Client-Side Privacy and Security
A secure passphrase generator runs client side, which means the words are drawn on your device and the finished phrase is never sent to a server. Look for that statement before you trust any passphrase generator tool, and avoid pages that ask you to create an account first.
Security also depends on copy and save habits: paste the phrase straight into your vault, close the tab, and do not email it to yourself. Cybercriminals harvest credentials from inboxes, clipboards and chat logs more often than they guess a random six-word phrase. Good randomness, a long word count and careful handling do the work that special characters never could.
Frequently Asked Questions
- Where do these word lists come from?
- They're the official BIP-39 wordlists -- a standardized set of word lists originally created for cryptocurrency wallet recovery phrases, now widely used anywhere a memorable, random multi-word secret is needed. Each language's list contains exactly 2,048 carefully chosen words (2^11, so each word contributes exactly 11 bits of entropy).
- Why 2,048 words instead of a shorter list?
- 2,048 is a deliberately convenient number: log₂(2048) = 11 exactly, so each word contributes precisely 11 bits of entropy with no rounding, and every word position needs only 11 bits to encode. It's also large enough that individual words are genuinely hard to guess, while every word across all languages is still unambiguous when abbreviated to its first 4 letters -- part of the original BIP-39 design goal.
- Is a passphrase in French or Spanish as secure as one in English?
- Yes -- security comes from the number of possible words (2,048, identical across every language here) and how many you choose, not which language they're in. The entropy math is exactly the same regardless of language.
- Why are German or other languages not available?
- The official BIP-39 standard doesn't include a German wordlist -- only English, French, Spanish, Italian, Portuguese, Czech, Japanese, Korean, and Chinese (simplified/traditional) are officially published. This tool currently supports the Latin-script languages from that set; the others may be added later.
- Is my generated passphrase sent anywhere?
- No. Every word is chosen using the Web Crypto API's cryptographically secure random number generator, entirely inside your browser -- nothing is transmitted or stored.