Pairwise Test Case Generator

Generate all-pairs (pairwise) test combinations from multiple parameters and values.

Runs 100% client-side
Copy outputCSV & Markdown export
On this page4 sections

Exhaustive: 27 tests

HOW TO USE

  1. 01Add each parameter and its possible values (e.g. Browser = Chrome, Firefox, Safari).
  2. 02Add as many parameters as the feature has — browser, OS, payment method, and so on.
  3. 03Click Generate to produce the minimal all-pairs test set that covers every value pair.
  4. 04Copy the table or Download CSV for your test tracker.

Try it

Browser = Chrome, Firefox, Safari · OS = Windows, macOS · Auth = SSO, Password → Generate

WHEN TO USE

Use Pairwise (all-pairs) testing when a feature has multiple independent parameters and exhaustive combination testing is impractical. The all-pairs algorithm guarantees that every pair of parameter values appears in at least one test case, covering the majority of real-world defects with a fraction of the full combination count. Ideal for configuration matrices, form fields with multiple independent options, and API parameters.

WHAT BUGS THIS FINDS

  • Parameter interaction defects

    Bugs that only appear when two specific values occur together -- missed by single-variable testing.

  • Untested configuration combos

    Edge-case OS/browser/device combos that would be skipped in manual test planning.

  • Integration gaps

    Two features that each work independently but break when used simultaneously.

QA USE CASES

01

Browser × OS × screen size matrix

3 browsers × 3 OS × 4 sizes = 36 combos → pairwise reduces to ~12

02

Payment form -- card type × currency × 3DS

Covers all pairs without testing all 24 combinations

03

API parameter combinations

format × sort × filter × page → pairwise test set catches most interaction bugs

04

CI pipeline -- language × framework × DB

Reduces matrix from 48 runs to ~16 while maintaining pair coverage