Online Tool Store
Data Quality Scorecard
Upload a CSV to check it for missing values, duplicates, formatting issues, and outliers, with an overall quality score. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example shown — upload your own CSV to score its data quality.
How it works
- Upload a CSV file.
- The dataset is checked for missing values, duplicates, formatting issues, and outliers.
- See an overall quality score plus a breakdown by check.
Scoring runs a set of standard data-quality checks against every column — null rates, duplicate detection, format consistency, and statistical outlier detection — and combines the results into a single score with a per-check breakdown.
FAQ
Is my CSV uploaded anywhere?
No. Analysis happens entirely in your browser — your data is never sent to a server.
What checks does it run?
Missing values, duplicate rows, inconsistent formatting within a column, and statistical outliers are all checked and scored.
How is the overall score calculated?
Each check contributes a weighted penalty based on how much of the dataset it affects, combined into a single 0-100 score.
Does it tell me which rows have issues?
Yes — beyond the summary score, each check links to the specific rows or columns it flagged.
How we compare
| Feature | Online Tool Store | Manual spreadsheet review | Data quality platforms |
|---|---|---|---|
| One score summarizing every check | ✓ | Slow, easy to miss issues | ✓ |
| Free, no sign-up | ✓ | ✓ | Often enterprise pricing |
Enterprise data quality platforms go deeper but cost real money. Data Quality Scorecard covers the everyday CSV health check for free.