Feature Flag Test Matrix

List feature flags and generate the full 2^N on/off test matrix or a pairwise-reduced set — baseline all-on/all-off rows highlighted, impossible combos markable.

Runs 100% client-side
Copy outputCSV & Markdown export
On this page5 sections

Feature flags (each is ON or OFF in the matrix)

Mode

HOW TO USE

  1. 01Add each feature flag you need to test.
  2. 02Choose Mode: full (every 2^N combination) or pairwise (the minimum set covering every flag-pair).
  3. 03Mark impossible combinations to exclude them; the all-on and all-off rows are always included.
  4. 04Copy the matrix or Download CSV for your test run.

Try it

Flags: new-nav, dark-mode, ai-summary → full = 8 rows, pairwise = ~6

WHEN TO USE

Use when you need to test a system with multiple feature flags — the matrix enumerates every on/off combination so no configuration is missed. The pairwise-reduction option cuts the number of runs from 2^N to the minimum set that covers every pair of flag states, which is typically practical up to 10+ flags. Baseline all-on and all-off rows are always included.

WHAT BUGS THIS FINDS

  • Flag interaction defects

    Feature A works alone and Feature B works alone, but both enabled simultaneously causes a layout collision or API conflict — only caught by testing combinations.

  • Default-on / default-off confusion

    All-on and all-off rows are explicitly highlighted to confirm baseline and regression states are always tested.

  • Impossible combination accepted

    Marking an impossible combination then retesting confirms the application correctly prevents or ignores that configuration.

QA USE CASES

01

Release flag combinations

3 release flags → 8 full matrix runs OR ~6 pairwise runs — every flag-pair interaction covered

02

A/B test combinations

Flags: new-checkout, dark-mode, ai-search → pairwise ensures no pair of feature interactions is missed

03

Kill-switch regression

Mark impossible combos (e.g. checkout enabled without auth enabled) → excluded rows keep the matrix clean

04

Environment parity check

Generate the matrix and check each row against staging environment state to confirm all configurations are reachable

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