Free Security Tools
Quick checks for passwords, downloads, and suspicious emails, built so you don't have to hand your data to a random website.
- Free
- No signup
- Runs in your browser
Password Strength Checker
See how long a password could hold up, and exactly what makes it weak.
Open toolSecure Password Generator
Create a strong random password or an easy-to-type passphrase in one click.
Open toolHash Generator & Verifier
Check that a download is exactly what its publisher released.
Open toolEmail Header Analyzer
See who really sent an email, and whether it passed SPF, DKIM, and DMARC.
Open tool
Which tool do you need?
You're about to reuse a password
Don't. Check how strong your current pattern is, then create a new one for this account and store it in a password manager.
You just downloaded a file
If the publisher lists a checksum, compare it with your copy. Use the value on the publisher's own site, not the page that offered you the file.
An email looks off
It claims to be your bank, employer, or a service you use, but something feels wrong. Read its headers before you click anything.
What happens to what you enter
Nothing leaves your device. That matters most on tools like these, so here's what we do about it.
- Done in your browserAll four tools work on your device, with no account and nothing saved.
- Network access blockedEach tool page tells your browser to stop its scripts from opening network connections.
- Still, use good habitsAvoid entering live passwords or secrets into any online tool, including ours.
Getting reliable results
- Compare against the source. A hash only means something when you check it against the value on the publisher's own site.
- Treat results as a first check. A clean result is reassuring, not a verdict. Stick to official download sources, keep software updated, and be wary of anything unexpected.
- Use your own mailbox. Email results are only reliable when you copy the headers from your own mail service.
Frequently asked questions
Are these tools free?
Yes. All of them are free to use and require no account or signup.
Do these tools send my data anywhere?
No. All four do their work inside your browser. Each tool page also tells your browser to block its scripts from opening network connections, so what you enter isn't sent to us.
Should I paste a real password or secret to test it?
It's safest not to. Even though nothing is sent, the good habit is never to put a live password, private key, or other real secret into any online tool. Test a similar pattern instead, and rely on a password manager for your real credentials.
Which hash should I use, MD5 or SHA?
Use SHA-256 when the publisher offers it. MD5 and SHA-1 only help spot accidental corruption, and shouldn't be relied on as a security guarantee.
Do these tools replace antivirus or a password manager?
No. They're quick checks that complement good habits. Keep using reputable, updated security software and a password manager.
Time and unit calculators
For everyday date and time questions, use these guides. Results depend on the assumptions explained on each page.