Free tools
Small tools that answer a security question in a minute.
Calculate a CVSS score, estimate the effort of a pentest, generate a security.txt or check whether the CRA or NIS2 applies to you. Everything runs in your browser, nothing is sent to us.
In short
Zyberum offers free browser-based security tools: a CVSS 3.1 calculator, a pentest effort and price estimator, a security.txt generator according to RFC 9116, a Cyber Resilience Act applicability check and a NIS2 applicability check. No registration, no data leaves the browser.
All tools
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Is your product affected by the Cyber Resilience Act?
Free Cyber Resilience Act self-check: four questions tell you whether your product is in scope, which class it falls into and which deadlines apply.
Free toolDoes NIS2 apply to your company?
Free NIS2 self-check: three questions on sector and size tell you whether your company is an important or especially important entity under NIS2.
VulnerabilitiesCVSS 3.1 Calculator
Free CVSS 3.1 calculator: pick the eight base metrics, get score, severity and vector string instantly. Paste an existing vector to decode it. Runs in your browser.
Penetration testingPentest Cost Estimator
Estimate how many days a penetration test takes and what it typically costs: pick the target, its size, the approach and a retest. Market ranges for Germany and the EU.
Vulnerability handlingsecurity.txt Generator
Create a valid security.txt in a minute: contact, expiry date and the optional fields of RFC 9116, with validation. Copy or download and publish it at /.well-known/.
Privacy
Everything stays in your browser
The tools are static JavaScript. Your inputs are processed on your device and are not transmitted, stored or logged by us. The only thing we measure, with your consent, is that a tool was used and which result category it produced, so we know which tools are useful.
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The tool gave you a result. Now what?
Discuss your result with a security engineer in 15 minutes and find out what the practical next step is.
- Your result, interpreted for your situation
- What to do first
- Free and without obligation

Your call is withTom ZaubermannFounder & CEO, Zyberum
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We reply within one business day.