What Is a Password Generator and Why You Need One

Why Your Current Passwords Are Probably Weak

Most people know they should use strong, unique passwords — and most people do not. The reason is simple: strong passwords are hard to invent and even harder to remember. So instead, people reuse the same familiar password across dozens of accounts, perhaps swapping out a number at the end when a site forces a change.

The problem is not just that one weak password is easy to guess. When any service you use suffers a data breach — and breaches happen constantly — every account sharing that password is immediately at risk. Attackers take leaked credential databases and run them automatically against hundreds of other sites within seconds. This technique is called credential stuffing, and it is responsible for the majority of account takeovers today.

A password generator solves this at its root. Instead of you trying to invent something memorable, the tool creates a password that is genuinely random and cryptographically strong — something no human would type spontaneously, and something no attacker could guess or brute-force in any practical timeframe.

What Makes a Password Actually Strong?

Strength in a password comes down to one concept: entropy. Entropy measures unpredictability — how many possible combinations an attacker would need to try before landing on the correct one. The higher the entropy, the longer any brute-force attempt takes, and the safer the password is in practice.

Entropy increases with two factors: length and character variety. A 16-character password using only lowercase letters has substantially less entropy than a 16-character password mixing uppercase, lowercase, numbers and symbols — even though both are the same length. Each additional character type multiplies the number of possible combinations exponentially.

The practical takeaway: 12 characters with full character variety is the minimum for any account that matters. For email, banking or anything linked to payment methods, 16 or more characters is the right target.

How a Password Generator Works

A good password generator uses a cryptographically secure random number generator (CSPRNG) to select characters from a defined set. This is fundamentally different from the randomness your brain produces when you try to “think of something random” — humans are notoriously poor at true randomness and follow predictable patterns without realising it.

Modern browsers expose a CSPRNG through the Web Crypto API, which is what well-built online generators use. This means the password is generated entirely inside your browser — nothing is sent to any server or stored anywhere. Generation happens locally, which is both faster and more private than server-side alternatives.

What a good generator should offer

• Password length — Typically 8 to 64 characters, with 16 as a sensible default.
• Uppercase letters (A–Z) — Adds a second character pool on top of lowercase.
• Lowercase letters (a–z) — Included in virtually all generators.
• Numbers (0–9) — Required by the majority of sites.
• Symbols (!@#$% etc.) — Significantly increases entropy; some sites restrict which symbols are accepted.
• Exclude ambiguous characters — Removes characters like l, I, 1, O, 0 that look identical in certain fonts, useful when you need to type the password manually.

How to Generate a Strong Password on Convixy

Convixy's password generator runs entirely in your browser — no account, no sign-up, and nothing sent to a server. Here is how to use it:

• 1
  Go to convixy.com/password-generator. A strong 16-character password is generated automatically the moment the page loads.
• 2
  Adjust the length slider and toggle character types (uppercase, numbers, symbols) to match what the site you are registering with requires.
• 3
  Click the copy button to copy the password to your clipboard, then paste it directly into the password field. Click the refresh icon to generate a new one at any time.
• 4
  Save the password in a password manager (see the next section). Do not attempt to memorise it — that defeats the purpose of using a generator.

Where to Store Generated Passwords

The most common objection to using a password generator is: “I cannot remember a 16-character random string.” You are not supposed to. Generated passwords are designed to be stored in a password manager, not kept in memory.

A password manager is an encrypted vault that stores all your credentials behind a single master password. You only ever need to remember that one thing — the manager handles filling in the correct username and password for every site automatically. Popular options include Bitwarden (free and open-source), 1Password, and the built-in managers in Chrome and Safari.

The workflow becomes: generate a unique password for a new account → paste it into the registration form → let the manager save it → never think about it again. Over time, every account ends up with a unique, unguessable password without any additional mental effort.

Passwords vs. Passphrases: Which Is Better?

A passphrase is a sequence of random words rather than random characters — for example, correct-horse-battery-staple. Passphrases gain their strength from length: each word adds a significant amount of entropy, and four or five random words produce a credential that is both very strong and far easier to type or remember than a string of random symbols.

Passphrases are particularly suited to your master password — the one credential you actually need to recall. For everything else (the hundreds of site-specific passwords you will never type manually), a random character password stored in a manager is equally strong and slightly shorter for the same entropy level.

When to use each approach

• Random character password (16+ characters): Site logins, app accounts — anything stored in and filled by a password manager.
• Passphrase (4–5 random words): Your password manager master password, device login PIN, or full-disk encryption key.

Common Password Mistakes to Avoid

Even people who use a generator sometimes undermine their own security through habits around how passwords are handled. These are the most common pitfalls:

• Reusing passwords across sites. Even a single reused password creates a chain of vulnerability. Every account should have its own unique credential.
• Using personal information. Names, birthdays, pet names and phone numbers are guessable by anyone who knows you — or by anyone who has browsed your social media.
• Storing passwords in plain text. A text file, a phone note or a sticky note on a monitor are serious risks. Use a proper encrypted password manager.
• Skipping two-factor authentication (2FA). A strong password is one layer. Adding 2FA means that even if a password is compromised, an attacker still cannot access the account without your physical authenticator device.
• Not checking breach exposure. Services like Have I Been Pwned let you check whether your email address has appeared in known data breaches. If it has, change the affected passwords immediately.

Does Length or Complexity Matter More?

Length wins. A 20-character password using only lowercase letters has more entropy than a 10-character password using every possible character type. That said, the two are not in competition — a long password that also uses a full character set is the strongest possible combination.

The practical recommendation: use a minimum of 16 characters with uppercase, lowercase, numbers and at least some symbols. This puts any brute-force attempt well beyond what is computationally feasible with current hardware, including specialised password-cracking rigs running dedicated GPUs.