Sentinel

Validation Workflow Reads a spreadsheet, checks it against your rules, reports what fails.

1 · Data source

Drop an .xlsx / .xls / .csv here, or click to browse

No file loaded

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Rows checked

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Clean rows

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Errors

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Warnings

Load a file to run the checks.

Active rules

Self-contained single file. To change what gets flagged, edit the RULESET block near the top of the script — no other code needs to change.