AI Data Analyst
Analyze CSV and Excel spreadsheets in seconds using on-device AI. Get automated summary statistics, correlation matrices, visual charts, and executive insights.
Free AI Data Analyst for CSV & Excel Spreadsheets
Deterministic Mathematics + On-Device AI
1. Exact Math Engine
Calculates exact mathematical metrics: means, medians, IQR statistical outliers, standard deviations, and Pearson correlation matrices without LLM hallucinations.
2. Instant Visualizations
Automatically configures responsive Chart.js line and bar charts so you can visualize categorical splits, chronological trends, and cross-metric correlations.
3. Executive AI Synthesis
Local transformer neural networks analyze the computed statistical profile to formulate strategic business recommendations and identify data hygiene risks.
Understanding Pearson Correlation (r)
The Pearson correlation coefficient measures linear relationships between numeric variables on a scale from -1.0 to +1.0:
- +0.70 to +1.00: Strong positive correlation (as variable A grows, variable B predictably expands).
- +0.40 to +0.69: Moderate positive relationship.
- -0.40 to +0.39: Weak or negligible linear relationship.
- -0.70 to -1.00: Strong inverse relationship (increases in A correspond to declines in B).
Frequently Asked Questions
Is my business spreadsheet uploaded to any server?
No. All calculations, Chart.js visual renderings, and AI summaries run 100% inside your browser memory. Your rows and numbers never touch any external server or cloud API.
What file formats are supported?
The tool supports CSV (.csv), Tab-Separated Values (.tsv), and Excel workbooks (.xlsx).
How does the AI avoid hallucinating calculations?
We use a hybrid architecture: all mathematical operations (means, medians, IQR outliers, Pearson correlations) are computed deterministically by exact algorithms. The on-device AI is then given the structured statistical profile to generate executive findings and strategic recommendations.
How are outliers detected?
Outliers are calculated using the standard Interquartile Range (IQR) method: data points falling below Q1 - 1.5×IQR or above Q3 + 1.5×IQR are flagged as potential statistical anomalies.
Can I export the analysis findings?
Yes. You can copy the full analysis report to your clipboard or download it as a formatted Markdown (.md) or plain text document.
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