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CSV Z-Score Standardizer
Standardize selected CSV columns with explicit population/sample, empty-cell and constant-column policies.
Pasted CSV, One UTF-8 CSV file
standardized.csv, standardization-report.json
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter the input and explicit options shown. A selected UTF-8 file wins its corresponding pasted text.
- Select Standardize columns and inspect the complete stated conventions.
- Download standardized.csv, standardization-report.json.
Examples
Population values1,2,3 standardize symmetrically around exact zero.
Limitations
- At most1 MiB UTF-8,10000 data rows,100 columns,100000 cells including headers,20 selected columns,20 MiB combined CSV/report and30 seconds.
- Numeric grammar is optional sign,1–18 total digits and up to6 fraction digits, without spaces or exponents. Only exact-empty strings can be skipped/preserved; all-empty columns refuse. Sample deviation requires2 numeric values even for constant-to-zero.
- Scientific z-scores/deviations are approximate12-significant strings with exact5.1e-12 relative admission. Constant mapping is explicit; original unselected strings follow optional spreadsheet protection, on by default. CSV cannot declare cell types.
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