Check your website before your customers do.
Free website checker for uptime, SSL, security and privacy
Is the site up? Is the SSL certificate about to expire? Are important security headers missing? Enter your address and get the result in a few seconds.
Or go straight to: check an SSL certificate, check email protection, find third-party trackers or check a password against data breaches.
What you can check
13 free tools in four areas. No sign-up, results in seconds.
Security & privacy
Encryption, security headers and which third-party services your site loads.
Domain & email
DNS records, email spoofing protection and the expiry date of your domain.
Passwords & data
Check and generate passwords, verify that files are genuine.
How our tools work
- Nothing stored
- Checked addresses and results are not stored. Every check is a snapshot that only you see.
- No tracking
- No cookies, no analytics, no fonts from third-party servers. That is why we don’t need a cookie banner either.
- Servers in the EU
- Checks run on a server in a data centre in Germany. Passwords are only ever checked in your browser.
Latest guides
See all guidesHow to set up SPF, DKIM and DMARC, so nobody can spoof email in your name
What the three records do, how to set them up step by step and why your emails land in spam more often without them. With examples to copy.
Website security for small businesses, the checklist
Ten steps to protect your business website against the most common attacks. No IT department needed and a manageable amount of effort.
Google Fonts, Analytics and co., the privacy-friendly way
Google Fonts, Analytics and co. send your visitors’ data to third parties. Here is how to find third-party services on your website and replace them in a privacy-friendly way.