Chi-square / Fisher's Exact — free, runs in your browser
Contingency-table analysis of categorical variables: Pearson chi-square for any R×C table; for 2×2 tables, also Yates correction and Fisher's exact test… Computed in your browser — no data uploaded.
Open free tool →Runs in your browser
No software installation. Paste your data and get results instantly.
Publication-ready output
Export charts as SVG vector or HD/UHD PNG suitable for journal submission.
Data stays local
Nothing is uploaded. Your patient data never leaves your device.
Common questions
When should I use Chi-square?
Contingency-table analysis of categorical variables: Pearson chi-square for any R×C table; for 2×2 tables, also Yates correction and Fisher's exact test, with a warning when expected counts are too small.
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 Chi-square now
Contingency-table analysis of categorical variables: Pearson chi-square for any R×C table; for 2×2 tables, also Yates correction and Fisher's exact test… Computed in your browser — no data uploaded.
Open free tool →Free to use. No account required. No data uploaded.