A weak password is one of the most common entry points for account breaches. Our Secure Password Generator creates cryptographically random passwords up to 128 characters long – with full control over uppercase letters, lowercase letters, numbers, special characters, and exclusions for confusing or ambiguous characters. Strong, unique passwords generated in a single click.
Secure Password Generator
Why Use Our Secure Password Generator?
- Cryptographically random output: passwords are generated using PHP’s random_int() function, which draws from the operating system’s cryptographically secure random source – far stronger than basic random number generators.
- Length control from 8 to 128 characters: match the requirements of any site or service, from basic logins to high-security accounts.
- Full character set control: toggle uppercase letters (A–Z), lowercase letters (a–z), numbers (0–9), and special characters (!@#$%^&* and more) on or off.
- Exclude similar characters: remove easily confused pairs like i/l/1/L and o/0/O to make passwords easier to read and type manually.
- Exclude ambiguous characters: strip punctuation that causes problems in command lines, config files, or certain form inputs ({, }, [, ], (, ), /, \, quotes, and more).
- Instant strength indicator: see your password rated immediately so you know if it meets your security needs.
- Copy-to-clipboard button: copy with one click, no manual selection.
- No data stored, no accounts required – completely free.
Our Secure Password Generator is perfect for:
- Anyone setting up a new account who wants a password they couldn’t possibly guess themselves.
- System administrators creating credentials for servers, databases, or services.
- Developers generating API keys, secret tokens, or test credentials.
- Security-conscious users who understand that reusing or manually inventing passwords is a significant risk.
- Anyone who has been told their current password is too weak and needs a replacement immediately.
How to Use the Secure Password Generator:
- Set your desired password length using the length field (between 8 and 128 characters).
- Choose your character types: uppercase, lowercase, numbers, and/or special characters.
- Optionally, tick “Exclude Similar Characters” if the password will need to be typed manually and you want to avoid confusion.
- Optionally, tick “Exclude Ambiguous Characters” if the password will be used in command-line environments or configuration files where certain punctuation can cause issues.
- Click “Generate Password” to create your new password.
- Check the strength indicator, then click “Copy” to copy it to your clipboard.
- Paste it directly into your password manager or the account you’re setting up.
A strong password is long, random, and unique to each account. The single most important habit you can build around passwords is never reusing them - even a strong password becomes a liability if it’s used on multiple sites and one of them is breached. Pair any password generated here with a password manager (Bitwarden, 1Password, or similar) so you never have to memorise it.
Frequently Asked Questions
How secure is the password generation?
Passwords are generated server-side using PHP’s random_int() function, which is cryptographically secure – it draws from the operating system’s entropy pool (e.g., /dev/urandom on Linux). This makes the output genuinely unpredictable, unlike older rand() or mt_rand() based generators. The password is transmitted over HTTPS and is never logged or stored on our servers.
How long should my password be?
As a general rule, longer is always more secure. For most personal accounts, 16 – 20 characters is more than sufficient. For high-value accounts (banking, email, primary password manager), 24 – 32 characters is a good target. For technical credentials like API keys or database passwords, 32+ characters is common. Length has a far greater impact on security than character variety alone.
What are “similar characters” and why would I exclude them?
Similar characters are visually ambiguous pairs: i (lowercase i), l (lowercase L), 1 (number one), L (uppercase L), o (lowercase o), 0 (number zero), and O (uppercase O). In most fonts, these are hard to distinguish at a glance. If you ever need to read out or manually type a generated password – for example, when logging into a TV app or entering it on a device without easy paste support – excluding these characters reduces transcription errors significantly.
What are “ambiguous characters” and when should I exclude them?
Ambiguous characters are punctuation marks that have special meaning in certain technical environments: braces {}, brackets [], parentheses (), forward and back slashes, quote marks (single, double, backtick), tilde, comma, semicolon, colon, period, and angle brackets <>. Some systems or configuration files interpret these as syntax rather than literal characters, which can cause unexpected errors. Excluding them is recommended when generating passwords for SSH keys, database connection strings, shell scripts, or similar technical use cases.
Should I store this password somewhere?
You should never store passwords in plain text (a note, a spreadsheet, or a document). The right approach is a dedicated password manager – software designed specifically to store, encrypt, and auto-fill credentials securely. Popular options include Bitwarden (free and open-source), 1Password, and Dashlane. Once your new password is in your manager, you’ll never need to remember or type it manually – you just need to remember your one master password for the manager itself.
