Free online tools for security and development
Generate keys and IDs, hash and decode data, check passwords and passkeys. No sign-up, no install, and every tool page says where your data is processed.
All tools
Everyday security
For anyone who wants safer accounts: strong passwords and PINs, a strength check, and a test for passkey support.
Strength Checker
See how strong a password is and roughly how long it would take to crack.
Password Generator
Make long random passwords or easy-to-type passphrases.
PIN Generator
Random 4, 6, 8 or 12-digit PINs for phones, cards and door codes.
Random Number
Fair random numbers for giveaways, games and draws.
Passkey Checker
Find out if your device and browser can sign in with a passkey instead of a password.
Developer tools
Secret keys, UUIDs, hashes, bcrypt, JWTs and encoding, for building and debugging apps.
UUID Generator
Random v4 UUIDs, one at a time or in bulk.
Secret Key
Signing keys and API secrets in hex, Base64 or alphanumeric, with Django and Rails presets.
Hash Generator
MD5, SHA-1, SHA-256 and SHA-512 digests and HMAC, for text or files.
Bcrypt Generator
Hash a password with bcrypt at a chosen cost factor, or check one against a hash.
Base64 Encoder / Decoder
Encode and decode Base64 and URL-safe Base64, for text or files.
URL Encoder / Decoder
Percent-encode and decode URLs and query strings.
JWT Decoder
Read a JWT's header and claims, check expiry and verify HS256/384/512 signatures.
Password Policy Builder
Build password rules and export them as regex or JSON Schema.
How SecuredKit works
Clear about your data
Each tool page shows where it processes what you enter. All current tools run entirely in your browser, so passwords, keys and hashes never reach a server.
Built for real tasks
Make a signing key for your framework, debug a JWT, hash seed passwords or pick a PIN. Anything that must be unpredictable comes from the browser's cryptographic random source.
No sign-up
Open a page and use the tool. No account, nothing to install and nothing to pay.
Stay safe online
How to Create a Strong Password: The 2026 Guide
How to create a strong password: why length beats symbols, what NIST now requires, real RTX 4090 crack times, and when a passphrase is the better choice.
Your Data Was Leaked: What to Do in the First 48 Hours
Got a data breach notification? What to change first, how fast a leaked hash really falls, and how to stop credential stuffing and follow-up phishing.
2FA vs MFA: Which One Do You Really Need?
2FA is MFA with exactly two factors. What matters more is which second factor you pick: what SMS, TOTP, push and passkeys each stop, with NIST Rev. 4 rules.
Guides for developers
Salting and Hashing: A Developer's Practical Guide (2026)
How to store passwords in 2026: per-user salts, Argon2id or bcrypt settings from OWASP, real RTX 4090 numbers, peppers, and migrating old hashes.
Securing Your .env Files: 2026 Best Practices
Keep .env secrets out of git, Docker images and logs, generate them properly, and rotate first when one leaks. With real commands and my own deploy setup.
How Random Is Your 'Random'? CSPRNG Explained (2026)
A CSPRNG is a random source you can't predict from its output. I rebuilt Math.random() from 4 outputs in Node 22. Here's why, and what to use instead.
Who makes SecuredKit
SecuredKit is built and maintained by one developer, kodewright, who has worked in web development for more than 10 years. The same person builds and tests every tool and writes every guide. The tools are free and need no account.
More about the author →Questions
Is SecuredKit free?
Yes. Every tool and guide is free to use, with no account or sign-up.
Is my data sent to a server?
Each tool page says where it runs. All current tools, including the password, key and hash tools, run entirely in your browser, so what you type is never sent. The site uses Google Analytics to count page visits, but it never receives tool input or output.
Will more tools be added?
Yes. New tools are added over time, for both everyday security and development work. The list above always shows what is available.
How can I check where my data goes?
Open your browser's developer tools (F12 on most computers), select the Network tab and use a tool. Every request the page makes is listed there, so you can see exactly what leaves your device.