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Free tools, no signup

The reference data and calculators the app studies from, packaged as fast client-side tools. Every card shows a live preview built by the same logic the tool uses. Nothing is uploaded.

14 tools, all free

Showing 14 of 14 tools.

  • Subnet calculator + practice

    Solve any /1-/30 network, see the 32 bits, then drill random problems with worked steps and a streak.

    Calculator and drillOpen

  • IPv6 / CIDR calculator

    Compress, expand and mask an IPv6 address. See the network, last address and range size.

    CalculatorOpen

  • Ports cheat sheet + quiz

    Every exam-relevant port and protocol, filterable. Then a timed quiz that drills the job, not just the number.

    Reference and quizOpen

  • What runs on port N?

    Reverse lookup by number, service or protocol, with the job each service does.

    LookupOpen

  • OSI layer matcher

    Ten devices, protocols and data units. Pick the layer and see why it belongs there.

    DrillOpen

  • Acronym lookup + quiz

    The full Security+ acronym list with search, then drill mode for recognition.

    Reference and quizOpen

  • Base64 and hex decoder

    Decode an encoded string to text and bytes, with a hex view for binary output.

    DecoderOpen

  • Hash identifier

    Narrow a hash to likely algorithms by length and prefix, with an honest note on what cannot be known.

    IdentifierOpen

  • Password strength checker

    A pattern-aware check: leet substitutions, known words and keyboard walks, with online and offline crack-time estimates.

    CheckerOpen

  • CVSS v3.1 calculator

    Build a base vector, get the score and severity band, and read what the number does not measure.

    CalculatorOpen

  • Log and regex playground

    Test a pattern against a real-shaped auth and web log. See every match and capture group.

    PlaygroundOpen

  • Am I ready for Security+?

    10 original scenario questions across all five domains, with an honest readiness band.

    CheckOpen

  • Which cert should I take?

    Five questions, a recommendation with reasons, and the next step after it.

    QuizOpen

  • Exam version explainer

    701 vs 801, CS0-004, A+ cores, N10-009: which test to book and why.

    ReferenceOpen

Tools are free. The study engine is the next step

Every tool here maps to lessons and labs in the app. Start free and see which weak spots the engine finds first.

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