Non-parametric Tests (Mann–Whitney/Kruskal–Wallis) — free, runs in your browser
Compare groups when data are non-normal or ordinal: two independent groups → Mann–Whitney U, paired → Wilcoxon signed-rank, ≥3 groups → Kruskal–Wallis H… Computed in your browser — no data uploaded.
Open free tool →Runs in your browser
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Export charts as SVG vector or HD/UHD PNG suitable for journal submission.
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Common questions
When should I use Non-parametric Tests?
Compare groups when data are non-normal or ordinal: two independent groups → Mann–Whitney U, paired → Wilcoxon signed-rank, ≥3 groups → Kruskal–Wallis H, with tie correction and medians.
Is my data safe?
All calculations run entirely in your browser. No data is sent to any server. You can even use the tool offline after the page loads.
Run Non-parametric Tests now
Compare groups when data are non-normal or ordinal: two independent groups → Mann–Whitney U, paired → Wilcoxon signed-rank, ≥3 groups → Kruskal–Wallis H… Computed in your browser — no data uploaded.
Open free tool →Free to use. No account required. No data uploaded.