Three steps, without changing anything on your computer.
1
Install
Once, about 5 minutes: Python (official, free software), then KMB in one command.
2
Scan
A single command to copy. KMB examines your computer for 3 to 5 minutes, without changing anything.
3
See the result
Come back here, click “Analyse my report” and choose the file that was created.
What KMB checks
Every problem found is explained, with the commands to check and fix it yourself.
🖥️
System
Does your Windows, macOS or Linux still receive security updates?
🛡️
Protection
Antivirus, firewall, disk encryption and user accounts.
📶
Network and Wi-Fi
Services exposed on the network, unprotected or weakly encrypted Wi-Fi.
📦
Software
Outdated programs, or programs no longer updated by their publisher.
⚡
Performance
Memory, processor, startup programs and battery.
💾
Storage
Where your space goes, duplicates, large files, applications and space you can free safely.
🤖 An AI assistant to help you understand
After the scan, the AI explains your problems in plain words and helps you fix them, step by step.
💬
Explain this problem to me
Every problem explained simply, with the real risk and a concrete example.
📝
Summary of my report
The state of your computer in 5 lines: strengths and priorities.
🗺️
Personalised fix plan
What to do, in which order, with the right commands.
❓
Free questions
“Is it serious if…?”: ask your questions about your report.
📈
Before/after comment
What your fixes changed, and what is left to do.
🔒 Only with your consent. Only an anonymous summary of the problems is sent to the AI (never the computer name, your accounts or your files).
Every answer is checked by KMB, and unknown commands are flagged.
Important: at the bottom of the first window, check “Add python.exe to PATH”.
Click Install Now, wait, then click Close.
Already installed? Go to step 2. If you forgot the “Add python.exe to PATH” box, run the installer again, choose Modify, then check “Add Python to environment variables”.
Open the Command Prompt
Click the Windows Start button, type cmd and press Enter. A black window opens.
Install KMB (once)
Copy this command (“Copy” button), paste it into the black window (right-click) and press Enter:
python -m pip install kmb-library
Installation takes 1 to 3 minutes. It is done when you see Successfully installed … kmb-library.
Yellow WARNING … is not on PATH messages may appear: they don't matter.
Scan your computer
python -m kmb_library scan
KMB finds your computer name and all the information by itself. The scan takes 3 to 5 minutes (it examines all your disk space) and changes nothing.
Next times: open the Command Prompt (step 2) and type only this command.
Full check (optional): in the Start menu, type cmd, right-click “Command Prompt”,
choose Run as administrator, then type the same command.
See the result
At the end, the Documents\KMB Library folder opens by itself. Your report is named, for example:
KMB installs into its own ~/.kmb folder, without touching the system's Python. Copy the two lines, one at a time:
python3 -m venv ~/.kmb
~/.kmb/bin/python -m pip install kmb-library
Scan
~/.kmb/bin/python -m kmb_library scan
Full check: sudo ~/.kmb/bin/python -m kmb_library scan
See the result
Your report is in ~/Documents/KMB Library: upload the KMB-rapport_….json file.
Install Python
From python.org: open the downloaded file and follow the installer.
Install KMB (once)
Open Terminal (Applications > Utilities) and copy the two lines, one at a time:
python3 -m venv ~/.kmb
~/.kmb/bin/python -m pip install kmb-library
Scan
~/.kmb/bin/python -m kmb_library scan
See the result
Your report is in Documents/KMB Library: upload the KMB-rapport_….json file.
Analyse my report
Drop your KMB-rapport_….json file here, or:
You can choose two reports (before and after your fixes) to compare them.
See an example
🔒 The file is read by your browser. It is neither sent nor stored.
🤖 AI summary
A few lines summing up the state of your computer, in plain words.
Problems by severity
Score history
Fix first
Scan details
Fix plan
In order: most serious first. The gain is the number of points won back on the score.
🤖 AI assistant
A personalised fix plan. Only an anonymous summary of the problems is sent to the AI (no computer name, accounts, IP addresses or files).
Every step is tied to a real problem from the scan and every command is compared with KMB's verified database.
🤖 Ask a question about my report
Disks
Largest folders
Space you can free safely
Where your space goes
Large files (200 MB and more)
Largest installed applications
To free this space: uninstall the application (Settings > Apps); never delete its folder by hand.
Duplicate files
Applications using the most memory
Programs launched at startup
Hardware health
Wi-Fi
Frequently asked questions
Is my data sent over the Internet?
No. The report is read by your browser, on your computer. This site neither sends nor stores it.
The scanner only contacts the public endoflife.date site to find out software end-of-support dates (without sending anything personal).
The only exception, if you agree: the AI assistant. See the next question.
How does the AI assistant work?
The 🤖 buttons (“Explain this problem to me”, “Summarise my report”, fix plan, questions, comparison) use an AI.
The first time, the site asks for your consent. It then sends an anonymous summary of the problems detected (title, severity, finding,
known fix commands): never the computer name, accounts, IP addresses, your files or the full report.
This summary goes through the KMB Library relay, which sends it to the Groq AI service (open models) and returns the answer; nothing is stored.
AI can be wrong: KMB checks that every step matches a real problem from the scan and flags any command missing from its verified database.
The number of requests is limited (10 per hour) so that the service stays free for everyone.
Can the scanner damage my computer?
No. It reads information and changes nothing. Fixes are suggested: you decide whether to apply them.
Why do I need to install Python?
KMB Library is a Python library, like many computer tools. Python is installed from its official website, then a single command
installs KMB from PyPI, the official Python software repository: no unknown program to open, and KMB's code stays open to inspection.
“python” is not recognized, or the Microsoft Store opens?
Python is not installed, or the “Add python.exe to PATH” box was not checked. Run the Python installer again, choose “Modify”,
check “Add Python to environment variables”, then close and reopen the Command Prompt.
Some checks require administrator rights. For a full check, run the scan from a Command Prompt opened “as administrator” (see the guide, step 4).
These checks don't cost any points.
How can I see my progress after my fixes?
Scan again, then in “Analyse my report”, add the old and the new report. The “Comparison” tab shows what is fixed, what remains and what is new.
Which file should I choose?
The file that starts with KMB-rapport_ and ends with .json: it is your report, and this site displays it.
The donnees-brutes folder (raw data) and the .cache folder are only used internally and for verification.