What this page covers
The Strong Password Generator builds cryptographically styled random passwords with configurable length and character sets, helping you secure new accounts without reusing memorable (and weak) phrases.
Quick answer
Generate long random passwords with uppercase, lowercase, numbers, and symbols. Free password generator—copy instantly. Free in your browser on Case Modify—no… Use it in a browser with no account required, then review the output before publishing or shipping.
Part of Random generators
Strong password generator: long, random, browser-local
A strong password generator builds long random strings from uppercase, lowercase, numbers, and symbols so you can fill a password manager without inventing patterns. Length and true randomness beat clever substitutions like “P@ssw0rd”.
Generation runs in your browser after the page loads. Still follow your employer’s policy, and never reuse the same secret across banks, email, and social accounts.
How to use this converter
- Pick a preset (strong, memorable length, or custom) or set length manually (16–20+ for important accounts).
- Toggle character sets; exclude ambiguous characters if you must type the password by hand.
- Generate, copy once into your password manager, and save the vault entry.
- Enable MFA on the account—passwords alone are not enough for email and admin panels.
What “strong” means in practice
Modern guidance (including NIST-style advice) prioritizes length and uniqueness over frequent forced rotation. A 20-character random password from a large character pool resists guessing far better than an 8-character phrase with one symbol.
Avoid personal data, keyboard walks, and seasonal patterns (“Summer2026!”). If a site bans symbols, increase length instead of weakening the whole secret.
Password managers and MFA
Store generated passwords in a manager so you never reuse them. Turn on multi-factor authentication wherever offered. For API keys and service accounts, generate random strings and keep them in a secrets manager—not in chat or tickets.
Passwords vs UUIDs and PINs
UUIDs are identifiers, not login passwords—use the UUID generator for resource IDs. Short numeric PINs for devices are a different threat model; use the random number generator only when a site truly requires digits, and prefer longer secrets when allowed.
Before and after examples
| Original | Converted | Notes |
|---|---|---|
| Length 20, all sets | High-entropy manager secret | Default strong preset |
| Length 16, no symbols | Sites with symbol bans | Compensate with length |
Frequently asked questions
Is a browser generator safe?
Local generation after page load does not need to send the password to a server. Prefer HTTPS pages you trust, and store results in a manager.
How long should passwords be?
Aim for at least 16 characters for most accounts; 20+ for email, banking, and the manager master password.
Should I change passwords every 90 days?
Forced rotation often creates weaker patterns. Change passwords after suspected compromise or a known breach instead.
Related guides
How to use this tool
- Set desired length and toggle uppercase, lowercase, numbers, and symbols.
- Generate a password and copy it immediately to your manager.
- Regenerate until policy requirements from IT are satisfied.
Related pages on Case Modify
UUID Generator — Need unique IDs? Generate RFC 4122 UUID v4 values in one click—ideal for Postgres keys, API mocks, and QA data.
Random Number Generator — Pick random integers from dice rolls to statistical samples.
Frequently asked questions
How random are Strong Password Generator results?
Results are generated in your browser using JavaScript’s random APIs. They are suitable for games, testing, and picks, but not for regulated gambling or cryptographic keys without extra review.
Do I need an account to use Strong Password Generator?
No signup is required. Open the page, generate a result, and copy it—everything runs in your browser.
Can I copy or share the output?
Yes. Use the copy button on the tool page and paste the value into spreadsheets, chat, tickets, or code.
Related guides
Related Tools
UUID Generator: Need unique IDs? Generate RFC 4122 UUID v4 values in one click—ideal for Postgres keys, API mocks, and QA data.
Random Number Generator: Pick random integers from dice rolls to statistical samples.
Strong Password Guide: Strong Password Guide
Random generators: All Random Generators