Password Generator – Strong Random Passwords & Passphrases (Free Online)

Password Generator – Strong Random Passwords & Passphrases

Use this free Password Generator to create strong, random passwords or memorable passphrases. Choose length and character sets, avoid look-alike characters, and view entropy and crack-time estimates. Everything runs in your browser with secure randomness.

Contents: Password Generator • Passphrase Generator • FAQ

Password Generator

Length

Character sets

a–z A–Z 0–9 Symbols (!@#$…)

Symbols (customize) Only used if “Symbols” is checked

Filters

Avoid similar (O/0, l/1, I) Require at least one of each selected set

Entropy: — bits • Pool: — • Est. crack time: —

Passphrase Generator

Words

Separator

Additions

Capitalize first letter Append one digit

Entropy: — bits • Word list: — words • Est. crack time: —

Why Use This Password & Passphrase Generator?

• Secure randomness: uses crypto.getRandomValues, not Math.random().
• Customizable: length, symbols, avoid look-alikes, require each set.
• Strength insights: entropy estimate and crack-time approximation.
• Passphrases: easy to remember yet strong, with separators and optional digit.
• Private: runs entirely in your browser; nothing is saved or uploaded.

FAQ – Password Generator

Is this secure enough for real accounts?

Yes, it uses the browser’s cryptographic RNG. For best results, use 16+ characters or a 5+ word passphrase and store it in a reputable password manager.

What does “avoid similar characters” do?

It removes look-alike characters like O/0 and l/1/I to reduce confusion when typing or reading passwords.

What does the entropy value mean?

It’s the estimated unpredictability (bits). Each extra bit doubles the guess space. Around 80+ bits is considered strong for general use.

Do you send or store any data?

No. Everything runs locally on your device; no data leaves your browser.