# Extract Data from Chart Screenshots into Excel Online

> When someone sends a picture of a graph without the underlying spreadsheet, extracting numbers by hand is slow and error-prone. FastToChart converts chart images directly into clean, structured Excel worksheets and CSV files.

## How It Works

1. Upload or paste your chart image, screenshot, or PDF page.
2. AI identifies categories along the axis and reads all series values.
3. Download an organized .xlsx spreadsheet with columns for categories and series ready for calculations.

## Structured Numerical Data Ready for Formulas

The exported spreadsheet is organized logically: category labels in column A, followed by one column for each series. Values are saved as pure unformatted numbers, allowing immediate summation, VLOOKUP, and pivot table modeling.

Original formatting indicators—such as percentages, currency symbols ($/€/£), and magnitude multipliers (K/M/B)—are preserved in column metadata and number formats.

## Dedicated Data Confidence Sheet

In high-stakes financial and research modeling, knowing data pedigree is critical. FastToChart includes a secondary 'Confidence' worksheet inside the .xlsx file that documents the extraction certainty percentage for every single cell.

- High confidence (90%+): Copied verbatim from printed labels on the graph.
- Medium confidence (75-90%): Calculated from axis ticks with clear geometric anchors.
- Low confidence (<75%): Interpolated from small or partially obscured bars.

## Export to CSV and TSV

Need to feed data into Python pandas, R, Jupyter notebooks, or Google Sheets? FastToChart also provides instant CSV export formatted with UTF-8 encoding and clean delimiter handling.

## Frequently Asked Questions

### How does it handle European decimal commas vs. American decimal points?

FastToChart automatically detects whether the source chart uses commas (e.g. 14,5%) or points (14.5%) and normalizes numbers cleanly into standard Excel numeric format.

### What if some values on the chart do not have printed numbers?

FastToChart estimates the height or position of the bar/point relative to the axis grid lines and provides an estimate tag in the table.

### Is there a limit on table size?

FastToChart effortlessly processes charts with dozens of categories and multiple series, exporting clean multi-row spreadsheets.

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Source: https://fasttochart.click/chart-image-to-excel