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PDF guide + calculator · 2026

Landing Page A/B TestingKnow whether a version really performs better, or whether the gap is noise.

Cover of the guide Landing page A/B testing

14-page PDF guide · in English

€39

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Instant download after payment; the link is also e-mailed. Refunded within 14 days on simple request.

One test followed from the first day to the last: decide whether your traffic allows a test, write the hypothesis and pick the metric and its guardrails, calculate sample size and duration, set the test up client-side, server-side or in middleware without flicker or cloaking and with consent handled, check the split (SRM), read the p-value and the confidence interval, and still learn with low traffic. The calculator does the maths; 60 test ideas give you what comes next.

A4 pages
14A4 pages
chapters
12chapters
latest edition
Oct 2026latest edition

This guide also exists in French: A/B test de landing page — guide 2026 et calculateur

What you get

  • 14 A4 pages — 12 chapters, real table of contents below, clickable sources
  • Calculator (xlsx), 6 sheets — sample size and duration, result reading (p-value, confidence interval), SRM check, ICE prioritisation, test log
  • Calculated reference table — visitors needed per version by current rate (1 to 10%) and effect sought (5 to 50%)
  • Setup — client-side, server-side or middleware, Next.js example, Google's rules (canonical, 302, no cloaking), consent in the EU and the US
  • Reading the result — two worked calculations, the four outcomes, the traps (segments, novelty, multiple versions)
  • Low traffic — six ways to learn without 20,000 visitors, with their limits
  • 60 test ideas — by page section: headline, button, form, proof, offer, FAQ, speed, after the conversion
  • 30-point checklist — before, during and after the test

Preview: real pages of the PDF

  • Cover of the guide Landing Page A/B Testing
    Cover
  • Chapter on setup: three options, Next.js middleware, Google's rules
    Setup

VerifiedReviewed by industry professionals

Checked on every update. Reviewed by pros.

deliverables checked: up-to-date ZIP, one access per product
30deliverables checked: up-to-date ZIP, one access per product
articles checked: no broken internal link
429articles checked: no broken internal link
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The method

  1. 1Primary sources: official texts and ad platforms' help pages, never a summary of a summary.
  2. 2Every rule linked to its source, every study to its verified DOI.
  3. 3Dated editions: guides last updated November 2026.

Built from the texts and frameworks of:

  • Google Search Central
  • EUR-Lex
  • FTC (eCFR)
  • California Legislative Information
  • Next.js documentation
  • ACM SIGKDD
  • Springer (Data Mining and Knowledge Discovery)

Contents

Table of contents

14 pages · Edition of October 31, 2026

  1. 1. How to use this guidep. 3
  2. 2. Should you test? The traffic thresholdp. 4
  3. 3. Hypothesis and metricsp. 4
  4. 4. Sample size and durationp. 5
  5. 5. Setting the test upp. 7
  6. 6. While the test runsp. 8
  7. 7. Reading the resultp. 9
  8. 8. Low traffic: learning without 20,000 visitorsp. 10
  9. 9. What to test: 60 ideas by sectionp. 10
  10. 10. Worked example: one test from the maths to the decisionp. 11
  11. 11. 30-point checklistp. 12
  12. 12. Sourcesp. 13

Who it is for

  • Freelancers and agencies whose clients ask "what should we test, and for how long?".
  • Marketers and founders who buy traffic and want to know whether a new version really does better.
  • Developers who must set the test up properly: assignment, cookie, measurement, SEO, consent.

14-day money-back guarantee

One email is enough for a full refund, no questions asked. The file downloads right after payment and the link is emailed to you.

Terms of sale

Why this guide

What it adds

Free articles explain A/B testing in general; this guide follows one landing page test step by step, with the maths done in the workbook and the decision to take for each outcome.

Google's testing rules (canonical, 302, duration) and consent rules are cited and dated, with a flicker-free middleware example.

No promised gains: three published studies (Kohavi et al. 2009; Johari et al. 2017 on repeated peeking; Deng et al. 2013 on variance reduction), read for what they show.

In pictures

Printed charts and a tablet on a work table
Printed charts and a tablet on a work table. Photo: William Iven firmbee, CC0
Traffic charts on a laptop screen
Traffic charts on a laptop screen. Photo: Luis Llerena, CC0
Chess game in progress, wooden pieces
Chess game in progress, wooden pieces. Photo: Maarten van den Heuvel mvdheuvel, CC0

Illustrative photos, published by their authors under a free licence.

The complete guide — €39

Landing Page A/B Testing — 2026 guide and calculator. 14 pages.

Need the strategy and copy too? Landing Page Strategy Kit — €79

Get the guide — €3914-day money-back guarantee

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You pay → instant access + email → findable at any time (Find my purchases) · Questions: admin@tech-bharat.com

Payment and delivery

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How it works

  1. 1. You pay on Stripe
  2. 2. You download the .zip right away
  3. 3. The link and your invoice are emailed to you

A question before you buy? Clément Lacaille, LanderKit's publisher, answers himself: admin@tech-bharat.com

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FAQ

Questions before buying

Related articles

Other guides

Do I need a paid tool?

No. The guide explains the three setups (script, server, middleware); the calculator works in Excel, Google Sheets or LibreOffice. An experimentation tool still helps for sequential methods, and the guide says how to choose one.

My site has little traffic. Will it help?

Yes: chapter 2 tells you at once whether a classic test is possible, and chapter 8 gives six ways to learn without 20,000 visitors.

Is there a French version?

Yes, adapted to French rules (CNIL) with its own French calculator.

What format is it?

A 14-page A4 PDF and an Excel workbook (xlsx) in a ZIP file, downloadable right after payment, with a link sent by e-mail.

Can I use it for client work?

Yes, for your projects and your clients' projects. Reselling or publishing the PDF and the workbook is not allowed.

What if it does not help?

Write to us within 14 days and we refund you.