Fleiss' Kappa (multi-rater) — free, runs in your browser
Agreement among 3+ raters making nominal classifications of multiple subjects. Cohen's κ is for two raters only; for more, use Fleiss' κ. Gives κ, stren… 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
What are the original references?
Fleiss JL. Psychol Bull 1971;76:378-82; Landis JR, Koch GG. Biometrics 1977;33:159-74. PMID 843571.
When should I use Fleiss' Kappa?
Agreement among 3+ raters making nominal classifications of multiple subjects. Cohen's κ is for two raters only; for more, use Fleiss' κ. Gives κ, strength of agreement, per-category proportions and expected agreement.
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 Fleiss' Kappa now
Agreement among 3+ raters making nominal classifications of multiple subjects. Cohen's κ is for two raters only; for more, use Fleiss' κ. Gives κ, stren… Computed in your browser — no data uploaded.
Open free tool →Free to use. No account required. No data uploaded.
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