How to Generate Strong Passwords That You Will Actually Remember

I have been in software development for over a decade, and I still see smart colleagues using the same passwords across personal and professional accounts. The friction of managing dozens of unique passwords is real, and good intentions often lose to convenience.

After a former employer suffered a credential-stuffing attack — where leaked passwords from one service were used to break into accounts on another — I became careful about unique passwords for every account. I also realized that memorizing twenty random passwords was not realistic for anyone. The solution was not to try harder to remember, but to generate passwords smartly and let a password manager do the remembering.

When I designed the SaveVex Password Generator, I focused on making it easy enough that I would actually use it every day. The tool generates cryptographically random passwords locally in your browser, with full control over length and character types. No server ever sees your passwords. No data is logged. You generate, you copy, you move on with your day.

The Math Behind Password Strength

Understanding password security starts with understanding entropy — the measure of unpredictability in your password. Each character you add multiplies the number of possible combinations exponentially.

The standard character set for a strong password includes 94 characters (26 uppercase letters, 26 lowercase letters, 10 digits, and 32 common symbols). The entropy per character can be calculated as the base-2 logarithm of the character set size:

log2(94) = approximately 6.55 bits per character

This means each additional character adds 6.55 bits of entropy. Here is how that translates into practical security:

8 characters: With 94 possible choices per position, an 8-character password has 94 to the power of 8 possible combinations — roughly 6.1 quadrillion possibilities. Against a fast hash function like NTLM, a modern GPU cluster can attempt around 100 billion guesses per second. At that rate, an 8-character password falls in approximately 17 hours. This is why 8 characters is no longer considered sufficient for any important account.

12 characters: Jumping to 12 characters increases the combination space to approximately 4.8 sextillion possibilities. At the same 100 billion guesses per second, cracking a 12-character password would take about 152,000 years. This is the current recommended minimum for most accounts.

16 characters: A 16-character password has approximately 3.7 octillion possible combinations. This is beyond any practical brute-force timeframe with current technology. This is what I use for my most critical accounts: email, password manager, banking.

These numbers assume a fast hash function like NTLM. For services using properly salted slow hash functions like bcrypt or Argon2, the effective cracking rate drops to thousands of guesses per second, making even an 8-character password practically uncrackable. However, you cannot control which hash function a service uses, so assume the worst case.

What Makes a Password Strong in Practice

Beyond the math, a strong password has three essential qualities:

Length. Length dominates every other factor. A 20-character password using only lowercase letters has more total entropy than a 10-character password using the full 94-character set. When given the choice, choose the longer password.

Randomness. Human-generated passwords follow predictable patterns — keyboard walks like "qwerty," common substitutions like "p@ssw0rd," and personal information like birthdates. Cracking tools know all of these patterns. The only way to guarantee unpredictability is to use a cryptographically secure random generator.

Uniqueness. Every account must have a different password. When a service you use suffers a breach, that password will be tested against your email, bank, and social media within minutes. Reusing passwords turns one breach into a cascade of compromises.

How to Use the SaveVex Password Generator

The tool is straightforward by design:

1. Navigate to the Password Generator tool on SaveVex.
2. Set the length to 16 characters for most accounts. Use 20 or more for critical accounts like email and banking.
3. Enable all four character types: uppercase, lowercase, digits, and symbols.
4. Click generate. The tool creates a random password and displays its estimated strength.
5. Copy the password and save it in your password manager immediately.

Everything happens locally in your browser. No network requests are made. The password you generate exists only on your screen and in your clipboard until you save it elsewhere.

Pro Tips for Password Security

Use 16 or more characters for critical accounts. The difference between 12 and 16 characters is not incremental — it is exponential. A 16-character password has roughly 77,000 times more combinations than a 12-character password. For your email account (which controls password resets for almost everything else), your banking accounts, and your password manager, the extra four characters are cheap insurance.

Enable all character types. Every character type you exclude shrinks the search space for an attacker. Excluding symbols, for example, reduces the character set from 94 to 62 characters, which drops the entropy from 6.55 bits per character to 5.95 bits. That may not sound like much, but across a 16-character password, it reduces the total combination space by a factor of about 250. Include everything.

Use a password manager instead of trying to memorize passwords. This is the single most important piece of advice I can give. Password managers generate, store, and autofill strong passwords for every account. You only need to remember one strong master password. I have been using one for years, and it has eliminated password fatigue completely.

Generate a new password for every single account. No exceptions. A unique password for each account ensures that a breach on one service does not cascade to others. If you use a password manager, this becomes effortless — you generate a new random password for each account, the manager stores it, and you never have to think about it again. The only password you need to put effort into is your master password.

Avoid personal information in passwords. Your birthdate, your anniversary, your pet's name, your street address, and your favorite sports team are all discoverable from public records, social media profiles, and data broker databases. Attackers build targeted dictionaries from this information and try variations automatically. A password containing personal information is not random, and it can be guessed far more efficiently than brute force would suggest.

Conclusion

Password security does not require memorizing complex strings or changing your password every 90 days. It requires three habits: generate random passwords of sufficient length, use a unique password for every account, and let a password manager handle the rest. The math is on your side — a 16-character random password with the full character set is effectively uncrackable. The only remaining risk is human behavior, and that risk is eliminated by using a tool that handles the complexity for you.

The SaveVex Password Generator is free, private, and works entirely in your browser. Try it at the Password Generator page and generate your first uncrackable password in seconds.