Passphrase Generator — Free Secure Passphrase Generator Online

Passphrase Generator — Free Secure Passphrase Generator Online. Free online passphrase generator.

Generate secure, memorable multi-word passphrases from a 2,048-word list (11 bits per word) with the real entropy shown — customize word count, separator, and capitalization. 100% private.

Our free passphrase generator creates secure, memorable multi-word passphrases from the 2,048-word BIP39 English list. Choose 2–12 words, a separator, and optional capitalization or numbers — then copy your passphrase instantly.

All generation happens locally in your browser. How to Generate a Passphrase Set the word count (5 words, 55 bits, is the default; use 6 or more for important accounts). Choose a separator character (dash, dot, space, or any custom character).

Optionally enable Capitalize Words and/or Include Number. Click Regenerate for a fresh passphrase, or copy the displayed one.

Why Passphrases Are More Secure Each word of a random passphrase is chosen from 2,048 words, adding exactly 11 bits of entropy: 4 words give 44 bits, 5 words 55 bits, 6 words 66 bits and 8 words 88 bits.

For comparison, a random 8-character password using all 94 printable characters has about 52 bits. The BIP39 English list contains only common English words whose first four letters are unique, which makes them easy to type and remember. What Is a Passphrase?

A passphrase is a sequence of random words used as a password. Unlike a traditional password that substitutes letters with symbols, a secure passphrase gets its strength from word count and randomness.

The strength depends only on the size of the word list and the number of words, which is why this tool shows the entropy in bits for your exact settings.

Related Tools Check the strength of your passphrase with the Password Strength Analyser , or hash it securely with the Bcrypt Generator .

Frequently asked questions

How do I generate a random passphrase?

A 5-word passphrase is created when the page opens. Change Word Count (2 to 12), type a Separator, and tick Capitalize Words or Include Number; a new passphrase is generated on every change. Click Regenerate for another one and Copy to Clipboard to copy it.

How strong are the generated passphrases?

Each word is picked with the browser's cryptographic random generator from the 2,048-word BIP39 English list, so every word adds exactly 11 bits. The default 5 words give 55 bits, 6 words 66 bits and 8 words 88 bits. The entropy line under the passphrase shows the total for your settings.

What does Include Number do?

It appends one random digit (0 to 9) to one randomly chosen word, for example eagle-kite7-glove, to satisfy password rules that require a number. It adds only a few bits, about 4 to 7 depending on the word count, and the entropy line includes them.

Can I use spaces or no separator?

Yes. The Separator field accepts any text: a space, a dot, an underscore, several characters, or nothing at all to join the words directly.

Why use a passphrase instead of a password?

Multi-word passphrases are easier to remember and type than random character strings, and their strength comes mainly from length. Strength grows with the number of words and the size of the word list, so add more words rather than relying on capitals and digits.

Is the passphrase generated locally?

Yes. Generation uses crypto.getRandomValues in your browser; the passphrase is not sent to a server or stored.

How to use this online tool

Passphrase Generator — Free Secure Passphrase Generator Online is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

Passphrase Generator — Free Secure Passphrase Generator Online keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use Passphrase Generator — Free Secure Passphrase Generator Online for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.