TapCub is live — analytics, insights and live chat, free on one platform

Changelog What changed in the free tools

New tools, new features, fixes and data refreshes across all 171 tools. Each tool page also shows its own history.

  1. New featureAI crawler robots.txt checker v2.0 — Checks every AI crawler in the TapCub bot rules (up from 11), and links each one to its own crawler page.

  2. ImprovedConversion rate calculator v2.0 — Rebuilt on the new tools template, with links to the sample size, p-value, test duration and SRM tools.

  3. ImprovedRetention calculator v2.0 — Rebuilt on the new tools template, with links to the cohort table and churn rate tools.

  4. ImprovedUTM link builder v2.0 — Rebuilt on the new tools template: shareable links, a fuller guide and links to the bulk UTM builder and UTM checker.

  5. Launched167 tools launchedNet Promoter Score calculatorCSAT calculatorCustomer Effort Score calculatorMarketing ROI calculatorROAS calculatorCPM calculatorCTR calculatorAd metrics calculatorCustomer lifetime value calculatorCAC calculatorChurn rate calculatorFunnel calculatorDAU/MAU calculatorBounce rate calculatorPercentage change calculatorGrowth rate calculatorCAGR calculatorA/B test sample size calculatorP-value calculatorConfidence interval calculatorTimestamp converterJSON formatterURL encoder and decoderHash generatorWord counterSlug generatorCase converterCron expression generatorllms.txt generatorllms.txt validatorrobots.txt testerrobots.txt generatorUser agent parserWhat is my user agentAI bots directoryAI referral traffic regexServer log analyzerSERP previewMeta tag generatorOpen Graph previewSchema markup generatorSchema validatorHreflang generatorSitemap generatorRedirect generatorUTM checkerBulk UTM builderRegex tester for GA4A/B test duration calculatorMinimum detectable effect calculatorSRM checkerBayesian A/B test calculatorT-test calculatorChi-square calculatorStandard deviation calculatorSurvey sample size calculatorMargin of error calculatorTyping testErlang C calculatorLive chat staffing calculatorFirst response time calculatorCustomer service metrics calculatorLive chat ROI calculatorUptime calculatorWhatsApp link generatorMailto link generatorTime zone converterOut of office message generatorProfit margin calculatorMarkup calculatorBreak-even calculatorAverage order value calculatorCart abandonment rate calculatorCPC calculatorCPA calculatorLTV:CAC ratio calculatorCAC payback calculatorMRR and ARR calculatorSaaS metrics calculatorEngagement rate calculatorTraffic goal calculatorRPM calculatorChart makerCohort analysisAttribution model simulatorApp deep link generatorMini program scene valuesMini program path generatorPrivacy policy generatorCookie policy generatorCookie banner generatorConsent Mode generatorCompliance checklistBrowser privacy checkScreen resolutionJSON to CSV converterURL parserKeyword density checkerReadability checkerWeighted average calculatorZ-score calculatorLinear regression calculatorCharacter counter by platformDiff checkerDays between datesDate calculatorBase64 encoder and decoderUUID generatorJWT decoderHTML entity encoder and decoderUnicode converterJS, CSS and HTML minifierSQL, XML and YAML formatterJSON to YAML converterMarkdown to HTML converterTable converterText cleanerFind and replaceWord frequency counterHeadline analyzerSubject line testerChina Advertising Law checkerHeading checkerLink extractorAlt text checkerText to code ratioHTML validatorEmail validatorEmail header analyzerHEX to RGB color converterChannel classifierReferrer spam checkerTraffic change significanceTracking plan generatorData layer generatorCookie consent loss calculatorAnalytics script size comparisonIP anonymization demoDiscount calculatorPrice increase calculatorRevenue forecast calculatorMarketing budget calculatorYouTube money calculatorCost per lead calculatorEmail metrics calculatorLead scoring modelPipeline coverage calculatorAbandonment rate calculatorOccupancy and shrinkage calculatorTicket volume forecastCanned responses generatorCustomer service phrasesSurvey question generatorBusiness hours generatorEmail signature generatorImage compressorFavicon generatorOG image generatorColor contrast checkerApp store text checkerQR code generatorDNS lookupWHOIS lookupPage speed testMobile-friendly testSearch intent classifierKeyword clustering tool

  6. Launched4 tools launchedUTM link builderConversion rate calculatorRetention calculatorAI crawler robots.txt checker
Data sources

When each data source was last checked

Rules, lists and limits change. These are re-checked on a schedule; an overdue review shows up in our build checks.

When each data source was last checked
DataCheckedReview everyNext reviewUsed by
AI crawler operator documentation2026-11-093 months2027-02-09AI bots directory
Bot and AI crawler rules (same as the TapCub product)2026-11-103 months2027-02-10AI bots directory, AI crawler robots.txt checker, robots.txt generator, robots.txt tester, Server log analyzer, User agent parser, What is my user agent
AI assistant referrer domains2026-11-103 months2027-02-10AI referral traffic regex
Disposable email domains and IANA top-level domains2026-11-103 months2027-02-10Email validator
Referrer spam list (Matomo)2026-11-103 months2027-02-10Referrer spam checker
Measured analytics script sizes2026-11-103 months2027-02-10Analytics script size comparison
IANA RDAP bootstrap file2026-11-113 months2027-02-11WHOIS lookup
GA4 default channel group source lists2026-11-096 months2027-05-09QR code generator, Channel classifier, Bulk UTM builder, UTM checker
WeChat, Alipay and Douyin mini program scene values2026-11-106 months2027-05-10Mini program scene values
App store field limits2026-11-106 months2027-05-10App store text checker
Platform character limits2026-11-106 months2027-05-10Character counter by platform
Google Consent Mode documentation2026-11-106 months2027-05-10Consent Mode generator, Cookie banner generator
Third-party cookie names and lifetimes2026-11-106 months2027-05-10Cookie policy generator
GDPR, CCPA/CPRA and PIPL requirements2026-11-106 months2027-05-10Compliance checklist, Privacy policy generator
GA4 recommended events2026-11-106 months2027-05-10Data layer generator
Ad platform click ID parameters2026-11-106 months2027-05-10URL parser, Channel classifier
Video platform monetization rules2026-11-106 months2027-05-10YouTube money calculator
PageSpeed Insights / Lighthouse audits2026-11-116 months2027-05-11Page speed test, Mobile-friendly test
Device screen specs from manufacturers2026-11-1012 months2027-11-10Screen resolution
China Advertising Law and enforcement guidelines2026-11-1012 months2027-11-10China Advertising Law checker
Mailbox provider sender guidelines2026-11-1012 months2027-11-10Subject line tester, Email metrics calculator
China public holiday schedule (State Council notices, 2019–2027)2026-11-1112 months2027-11-11Days between dates, Date calculator

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