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Software / KDL Security

KDL Security

Enter your website's address. In under a minute you get a score out of 100 and what to fix, in plain words. Nothing is changed on the site.

Buy · €39.90Free version
An audit result: score out of 100, six checks and the list of what to do, by order of importance.

What it does

  • HTTPS certificate: validity, days left, protocol
  • Security headers and exposed server version
  • Availability and response time
  • Domain email: SPF, DMARC, DKIM
  • Open ports, only if the site is yours or you have permission
  • Files left on the server (.env, .git, backups)
  • Score out of 100, advice sorted by urgency, PDF report

Free or Pro

Free versionPro version
Full audit and score out of 100YesYes
PDF reportYesYes
Sites tracked13
Automatic check every 6, 12 or 24 h—Yes
Alerts: site down, certificate expiring, score dropping—Yes
History and score chart—Yes
History export (CSV)—Yes
Report with your name and logo—Yes
Licence for 3 computers (Windows, Linux)—Yes
€39.90once, up to 3 computers
Buy

Screenshots

A site's history in the Pro edition: the score chart and the details of each check.
Tracked sites in the Pro edition, with their score and automatic monitoring.

Download

Free version. If you buy a Pro key, it activates in this same app.

Version 1.0.0

WindowsYour system

Windows 10 and 11.exe installer · 116.1 MB

LinuxYour system

Ubuntu, Debian, Mint.deb package · 96.9 MBFedora, openSUSE.rpm package · 86.2 MBArch, Manjaropacman package · 89.4 MBOther distributionsAppImage, no installation · 120.3 MB.tar.gz archiveNo installation · 114.8 MB

Or use it directly in your browser: security.kdl-tech.fr/free

The Windows files are not code-signed yet: the first time you run them, Windows SmartScreen may show a warning.

SHA-256 checksums
  • KDL-Security-1.0.0-Linux-amd64.deb1399095f2032c8ae47df54fb16d5ddee0b386034772b3bee866a6197cd67d885
  • KDL-Security-1.0.0-Linux-x86_64.rpm86882ae2bd938b358cef2cface3d08b699c95b587db47785f411ece19050d148
  • KDL-Security-1.0.0-Linux-x86_64.AppImagefe116ae1e943cd2f92fb48b559277a1bfe6e8bf592dbbba7a7ef4e1d616b266d
  • KDL-Security-1.0.0-Linux-x64.tar.gz4d7012d590849cff1883457f1cd0a402ac9c10f6a47f0399418dabcfbae04361
  • KDL-Security-1.0.0-Linux-x64.pkg.tar.xzb50e53bb863e36c610f78b165bed3132ecf6cfb415bdd3dffa466c9384fb754a
  • KDL-Security-1.0.0-Windows-Setup.exeb90e7e25934c8058840b229b288d804908b951ea65eb52c4655cabda5f4c0969

Questions

Does the software change my website?
No. It only reads what the site shows any visitor. Ports are checked only if you tick “This site is mine or I am allowed to check it”.
Where do the results go?
Nowhere. Audits and history stay on your computer. Only the Pro licence activation contacts kdl-tech.fr, once.
Does monitoring run when the computer is off?
No. It runs while KDL Security is open, even minimised next to the clock. It can start when you log in.
Is the Pro edition a subscription?
No. You buy it once, €39.90, for up to 3 computers.
Is there a version without installing anything?
Yes, a guided security check-up in the browser, for individuals and small businesses: security.kdl-tech.fr/free.